Home / 71,128.38-98,159.10-39,299.28

Finding the Fourth Proportional to 71,128.38, 98,159.10 and 39,299.28

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Solution

The fourth proportional to 71,128.38, 98,159.10 and 39,299.28 is: 54,234.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,128.38 : 98,159.10 = 39,299.28 : x
  2. Step 2: Convert to fraction form
    71,128.38/98,159.10 = 39,299.28/x
  3. Step 3: Cross multiply
    71,128.38x = 98,159.10 × 39,299.28
  4. Step 4: Simplify right side
    71,128.38x = 3,857,581,955.45
  5. Step 5: Solve for x
    x = 3,857,581,955.45/71,128.38
  6. Step 6: Final answer
    x = 54,234.08

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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.