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Finding the Fourth Proportional to 161,866.20, 242,869.35 and 86,898.87

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Solution

The fourth proportional to 161,866.20, 242,869.35 and 86,898.87 is: 130,385.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,866.20 : 242,869.35 = 86,898.87 : x
  2. Step 2: Convert to fraction form
    161,866.20/242,869.35 = 86,898.87/x
  3. Step 3: Cross multiply
    161,866.20x = 242,869.35 × 86,898.87
  4. Step 4: Simplify right side
    161,866.20x = 21,105,072,072.63
  5. Step 5: Solve for x
    x = 21,105,072,072.63/161,866.20
  6. Step 6: Final answer
    x = 130,385.91

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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.