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Finding the Fourth Proportional to 128,549.52, 192,488.88 and 103,452.48

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Solution

The fourth proportional to 128,549.52, 192,488.88 and 103,452.48 is: 154,908.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,549.52 : 192,488.88 = 103,452.48 : x
  2. Step 2: Convert to fraction form
    128,549.52/192,488.88 = 103,452.48/x
  3. Step 3: Cross multiply
    128,549.52x = 192,488.88 × 103,452.48
  4. Step 4: Simplify right side
    128,549.52x = 19,913,452,008.42
  5. Step 5: Solve for x
    x = 19,913,452,008.42/128,549.52
  6. Step 6: Final answer
    x = 154,908.80

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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.