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Finding the Fourth Proportional to 104,382.39, 156,308.61 and 87,470.94

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Solution

The fourth proportional to 104,382.39, 156,308.61 and 87,470.94 is: 130,984.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,382.39 : 156,308.61 = 87,470.94 : x
  2. Step 2: Convert to fraction form
    104,382.39/156,308.61 = 87,470.94/x
  3. Step 3: Cross multiply
    104,382.39x = 156,308.61 × 87,470.94
  4. Step 4: Simplify right side
    104,382.39x = 13,672,461,046.79
  5. Step 5: Solve for x
    x = 13,672,461,046.79/104,382.39
  6. Step 6: Final answer
    x = 130,984.36

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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.