Home / 105,300-157,950-31,428

Finding the Fourth Proportional to 105,300, 157,950 and 31,428

Calculator

Solution

The fourth proportional to 105,300, 157,950 and 31,428 is: 47,142

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,300 : 157,950 = 31,428 : x
  2. Step 2: Convert to fraction form
    105,300/157,950 = 31,428/x
  3. Step 3: Cross multiply
    105,300x = 157,950 × 31,428
  4. Step 4: Simplify right side
    105,300x = 4,964,052,600
  5. Step 5: Solve for x
    x = 4,964,052,600/105,300
  6. Step 6: Final answer
    x = 47,142

Related Problems

Find fourth proportional to 52,650, 78,975 and 15,714
Half scale
Find fourth proportional to 210,600, 315,900 and 62,856
Double scale
Find fourth proportional to 105,301, 157,951.50 and 31,429
Similar ratio
Find fourth proportional to 157,950, 236,925 and 47,142
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.