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Finding the Fourth Proportional to 128,937.48, 192,523.80 and 115,523.88

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Solution

The fourth proportional to 128,937.48, 192,523.80 and 115,523.88 is: 172,495.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,937.48 : 192,523.80 = 115,523.88 : x
  2. Step 2: Convert to fraction form
    128,937.48/192,523.80 = 115,523.88/x
  3. Step 3: Cross multiply
    128,937.48x = 192,523.80 × 115,523.88
  4. Step 4: Simplify right side
    128,937.48x = 22,241,096,368.34
  5. Step 5: Solve for x
    x = 22,241,096,368.34/128,937.48
  6. Step 6: Final answer
    x = 172,495.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.