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Finding the Fourth Proportional to 256,712.72, 384,987.18 and 88,192.40

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Solution

The fourth proportional to 256,712.72, 384,987.18 and 88,192.40 is: 132,260.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,712.72 : 384,987.18 = 88,192.40 : x
  2. Step 2: Convert to fraction form
    256,712.72/384,987.18 = 88,192.40/x
  3. Step 3: Cross multiply
    256,712.72x = 384,987.18 × 88,192.40
  4. Step 4: Simplify right side
    256,712.72x = 33,952,943,373.43
  5. Step 5: Solve for x
    x = 33,952,943,373.43/256,712.72
  6. Step 6: Final answer
    x = 132,260.46

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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.