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Finding the Fourth Proportional to 70,472.89, 105,693.15 and 42,017.89

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Solution

The fourth proportional to 70,472.89, 105,693.15 and 42,017.89 is: 63,017.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,472.89 : 105,693.15 = 42,017.89 : x
  2. Step 2: Convert to fraction form
    70,472.89/105,693.15 = 42,017.89/x
  3. Step 3: Cross multiply
    70,472.89x = 105,693.15 × 42,017.89
  4. Step 4: Simplify right side
    70,472.89x = 4,441,002,411.90
  5. Step 5: Solve for x
    x = 4,441,002,411.90/70,472.89
  6. Step 6: Final answer
    x = 63,017.18

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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.