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Finding the Fourth Proportional to 148,707.87, 205,218.45 and 80,725.47

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Solution

The fourth proportional to 148,707.87, 205,218.45 and 80,725.47 is: 111,402.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,707.87 : 205,218.45 = 80,725.47 : x
  2. Step 2: Convert to fraction form
    148,707.87/205,218.45 = 80,725.47/x
  3. Step 3: Cross multiply
    148,707.87x = 205,218.45 × 80,725.47
  4. Step 4: Simplify right side
    148,707.87x = 16,566,355,828.92
  5. Step 5: Solve for x
    x = 16,566,355,828.92/148,707.87
  6. Step 6: Final answer
    x = 111,402.01

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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.