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Finding the Fourth Proportional to 127,042.40, 175,329.20 and 70,472

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Solution

The fourth proportional to 127,042.40, 175,329.20 and 70,472 is: 97,257.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,042.40 : 175,329.20 = 70,472 : x
  2. Step 2: Convert to fraction form
    127,042.40/175,329.20 = 70,472/x
  3. Step 3: Cross multiply
    127,042.40x = 175,329.20 × 70,472
  4. Step 4: Simplify right side
    127,042.40x = 12,355,799,382.40
  5. Step 5: Solve for x
    x = 12,355,799,382.40/127,042.40
  6. Step 6: Final answer
    x = 97,257.29

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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.