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Finding the Fourth Proportional to 160,068.70, 240,253.71 and 81,239.50

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Solution

The fourth proportional to 160,068.70, 240,253.71 and 81,239.50 is: 121,935.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,068.70 : 240,253.71 = 81,239.50 : x
  2. Step 2: Convert to fraction form
    160,068.70/240,253.71 = 81,239.50/x
  3. Step 3: Cross multiply
    160,068.70x = 240,253.71 × 81,239.50
  4. Step 4: Simplify right side
    160,068.70x = 19,518,091,273.55
  5. Step 5: Solve for x
    x = 19,518,091,273.55/160,068.70
  6. Step 6: Final answer
    x = 121,935.71

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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.