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Finding the Fourth Proportional to 256,988.20, 385,548.72 and 99,174.28

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Solution

The fourth proportional to 256,988.20, 385,548.72 and 99,174.28 is: 148,787.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,988.20 : 385,548.72 = 99,174.28 : x
  2. Step 2: Convert to fraction form
    256,988.20/385,548.72 = 99,174.28/x
  3. Step 3: Cross multiply
    256,988.20x = 385,548.72 × 99,174.28
  4. Step 4: Simplify right side
    256,988.20x = 38,236,516,710.92
  5. Step 5: Solve for x
    x = 38,236,516,710.92/256,988.20
  6. Step 6: Final answer
    x = 148,787.05

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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.