Home / 72,964-100,690.32-39,430

Finding the Fourth Proportional to 72,964, 100,690.32 and 39,430

Calculator

Solution

The fourth proportional to 72,964, 100,690.32 and 39,430 is: 54,413.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,964 : 100,690.32 = 39,430 : x
  2. Step 2: Convert to fraction form
    72,964/100,690.32 = 39,430/x
  3. Step 3: Cross multiply
    72,964x = 100,690.32 × 39,430
  4. Step 4: Simplify right side
    72,964x = 3,970,219,317.60
  5. Step 5: Solve for x
    x = 3,970,219,317.60/72,964
  6. Step 6: Final answer
    x = 54,413.40

Related Problems

Find fourth proportional to 36,482, 50,345.16 and 19,715
Half scale
Find fourth proportional to 145,928, 201,380.64 and 78,860
Double scale
Find fourth proportional to 72,965, 100,691.70 and 39,431
Similar ratio
Find fourth proportional to 109,446, 151,035.48 and 59,145
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.