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Finding the Fourth Proportional to 148,640.08, 205,121.28 and 81,572.08

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Solution

The fourth proportional to 148,640.08, 205,121.28 and 81,572.08 is: 112,568.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,640.08 : 205,121.28 = 81,572.08 : x
  2. Step 2: Convert to fraction form
    148,640.08/205,121.28 = 81,572.08/x
  3. Step 3: Cross multiply
    148,640.08x = 205,121.28 × 81,572.08
  4. Step 4: Simplify right side
    148,640.08x = 16,732,169,461.86
  5. Step 5: Solve for x
    x = 16,732,169,461.86/148,640.08
  6. Step 6: Final answer
    x = 112,568.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.