Home / 71,686.14-98,929.42-39,423.20

Finding the Fourth Proportional to 71,686.14, 98,929.42 and 39,423.20

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Solution

The fourth proportional to 71,686.14, 98,929.42 and 39,423.20 is: 54,405.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,686.14 : 98,929.42 = 39,423.20 : x
  2. Step 2: Convert to fraction form
    71,686.14/98,929.42 = 39,423.20/x
  3. Step 3: Cross multiply
    71,686.14x = 98,929.42 × 39,423.20
  4. Step 4: Simplify right side
    71,686.14x = 3,900,114,310.54
  5. Step 5: Solve for x
    x = 3,900,114,310.54/71,686.14
  6. Step 6: Final answer
    x = 54,405.42

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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.