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Finding the Fourth Proportional to 84,007.60, 126,011.40 and 69,233.20

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Solution

The fourth proportional to 84,007.60, 126,011.40 and 69,233.20 is: 103,849.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,007.60 : 126,011.40 = 69,233.20 : x
  2. Step 2: Convert to fraction form
    84,007.60/126,011.40 = 69,233.20/x
  3. Step 3: Cross multiply
    84,007.60x = 126,011.40 × 69,233.20
  4. Step 4: Simplify right side
    84,007.60x = 8,724,172,458.48
  5. Step 5: Solve for x
    x = 8,724,172,458.48/84,007.60
  6. Step 6: Final answer
    x = 103,849.80

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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.