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Finding the Fourth Proportional to 170,948.70, 256,470.45 and 71,155.90

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Solution

The fourth proportional to 170,948.70, 256,470.45 and 71,155.90 is: 106,753.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,948.70 : 256,470.45 = 71,155.90 : x
  2. Step 2: Convert to fraction form
    170,948.70/256,470.45 = 71,155.90/x
  3. Step 3: Cross multiply
    170,948.70x = 256,470.45 × 71,155.90
  4. Step 4: Simplify right side
    170,948.70x = 18,249,385,693.16
  5. Step 5: Solve for x
    x = 18,249,385,693.16/170,948.70
  6. Step 6: Final answer
    x = 106,753.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.