Home / 115,990-173,985-28,438

Finding the Fourth Proportional to 115,990, 173,985 and 28,438

Calculator

Solution

The fourth proportional to 115,990, 173,985 and 28,438 is: 42,657

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,990 : 173,985 = 28,438 : x
  2. Step 2: Convert to fraction form
    115,990/173,985 = 28,438/x
  3. Step 3: Cross multiply
    115,990x = 173,985 × 28,438
  4. Step 4: Simplify right side
    115,990x = 4,947,785,430
  5. Step 5: Solve for x
    x = 4,947,785,430/115,990
  6. Step 6: Final answer
    x = 42,657

Related Problems

Find fourth proportional to 57,995, 86,992.50 and 14,219
Half scale
Find fourth proportional to 231,980, 347,970 and 56,876
Double scale
Find fourth proportional to 115,991, 173,986.50 and 28,439
Similar ratio
Find fourth proportional to 173,985, 260,977.50 and 42,657
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.