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Finding the Fourth Proportional to 100,921.73, 151,386.06 and 53,472.65

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Solution

The fourth proportional to 100,921.73, 151,386.06 and 53,472.65 is: 80,210.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,921.73 : 151,386.06 = 53,472.65 : x
  2. Step 2: Convert to fraction form
    100,921.73/151,386.06 = 53,472.65/x
  3. Step 3: Cross multiply
    100,921.73x = 151,386.06 × 53,472.65
  4. Step 4: Simplify right side
    100,921.73x = 8,095,013,044.33
  5. Step 5: Solve for x
    x = 8,095,013,044.33/100,921.73
  6. Step 6: Final answer
    x = 80,210.81

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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.