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Finding the Fourth Proportional to 70,416.92, 105,079.42 and 62,939

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Solution

The fourth proportional to 70,416.92, 105,079.42 and 62,939 is: 93,920.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,416.92 : 105,079.42 = 62,939 : x
  2. Step 2: Convert to fraction form
    70,416.92/105,079.42 = 62,939/x
  3. Step 3: Cross multiply
    70,416.92x = 105,079.42 × 62,939
  4. Step 4: Simplify right side
    70,416.92x = 6,613,593,615.38
  5. Step 5: Solve for x
    x = 6,613,593,615.38/70,416.92
  6. Step 6: Final answer
    x = 93,920.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.