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Finding the Fourth Proportional to 70,950.57, 97,909.95 and 38,685.79

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Solution

The fourth proportional to 70,950.57, 97,909.95 and 38,685.79 is: 53,385.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,950.57 : 97,909.95 = 38,685.79 : x
  2. Step 2: Convert to fraction form
    70,950.57/97,909.95 = 38,685.79/x
  3. Step 3: Cross multiply
    70,950.57x = 97,909.95 × 38,685.79
  4. Step 4: Simplify right side
    70,950.57x = 3,787,723,764.61
  5. Step 5: Solve for x
    x = 3,787,723,764.61/70,950.57
  6. Step 6: Final answer
    x = 53,385.39

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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.