Home / 71,128.68-98,153.76-40,909.20

Finding the Fourth Proportional to 71,128.68, 98,153.76 and 40,909.20

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Solution

The fourth proportional to 71,128.68, 98,153.76 and 40,909.20 is: 56,452.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,128.68 : 98,153.76 = 40,909.20 : x
  2. Step 2: Convert to fraction form
    71,128.68/98,153.76 = 40,909.20/x
  3. Step 3: Cross multiply
    71,128.68x = 98,153.76 × 40,909.20
  4. Step 4: Simplify right side
    71,128.68x = 4,015,391,798.59
  5. Step 5: Solve for x
    x = 4,015,391,798.59/71,128.68
  6. Step 6: Final answer
    x = 56,452.50

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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.