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Finding the Fourth Proportional to 103,400.80, 142,694.40 and 60,956.80

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Solution

The fourth proportional to 103,400.80, 142,694.40 and 60,956.80 is: 84,121.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,400.80 : 142,694.40 = 60,956.80 : x
  2. Step 2: Convert to fraction form
    103,400.80/142,694.40 = 60,956.80/x
  3. Step 3: Cross multiply
    103,400.80x = 142,694.40 × 60,956.80
  4. Step 4: Simplify right side
    103,400.80x = 8,698,194,001.92
  5. Step 5: Solve for x
    x = 8,698,194,001.92/103,400.80
  6. Step 6: Final answer
    x = 84,121.15

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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.