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Finding the Fourth Proportional to 128,646.36, 192,637.14 and 88,788.30

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Solution

The fourth proportional to 128,646.36, 192,637.14 and 88,788.30 is: 132,953.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,646.36 : 192,637.14 = 88,788.30 : x
  2. Step 2: Convert to fraction form
    128,646.36/192,637.14 = 88,788.30/x
  3. Step 3: Cross multiply
    128,646.36x = 192,637.14 × 88,788.30
  4. Step 4: Simplify right side
    128,646.36x = 17,103,924,177.46
  5. Step 5: Solve for x
    x = 17,103,924,177.46/128,646.36
  6. Step 6: Final answer
    x = 132,953.04

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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.