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Finding the Fourth Proportional to 105,179.76, 145,124.28 and 62,730

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Solution

The fourth proportional to 105,179.76, 145,124.28 and 62,730 is: 86,553.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,179.76 : 145,124.28 = 62,730 : x
  2. Step 2: Convert to fraction form
    105,179.76/145,124.28 = 62,730/x
  3. Step 3: Cross multiply
    105,179.76x = 145,124.28 × 62,730
  4. Step 4: Simplify right side
    105,179.76x = 9,103,646,084.40
  5. Step 5: Solve for x
    x = 9,103,646,084.40/105,179.76
  6. Step 6: Final answer
    x = 86,553.21

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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.