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Finding the Fourth Proportional to 274,125.78, 411,184.35 and 87,134.58

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Solution

The fourth proportional to 274,125.78, 411,184.35 and 87,134.58 is: 130,700.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,125.78 : 411,184.35 = 87,134.58 : x
  2. Step 2: Convert to fraction form
    274,125.78/411,184.35 = 87,134.58/x
  3. Step 3: Cross multiply
    274,125.78x = 411,184.35 × 87,134.58
  4. Step 4: Simplify right side
    274,125.78x = 35,828,375,639.82
  5. Step 5: Solve for x
    x = 35,828,375,639.82/274,125.78
  6. Step 6: Final answer
    x = 130,700.50

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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.