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Finding the Fourth Proportional to 128,988.84, 193,490 and 39,029.27

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Solution

The fourth proportional to 128,988.84, 193,490 and 39,029.27 is: 58,545.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,988.84 : 193,490 = 39,029.27 : x
  2. Step 2: Convert to fraction form
    128,988.84/193,490 = 39,029.27/x
  3. Step 3: Cross multiply
    128,988.84x = 193,490 × 39,029.27
  4. Step 4: Simplify right side
    128,988.84x = 7,551,773,452.30
  5. Step 5: Solve for x
    x = 7,551,773,452.30/128,988.84
  6. Step 6: Final answer
    x = 58,545.94

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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.