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Finding the Fourth Proportional to 276,681.60, 415,022.40 and 87,165.90

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Solution

The fourth proportional to 276,681.60, 415,022.40 and 87,165.90 is: 130,748.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,681.60 : 415,022.40 = 87,165.90 : x
  2. Step 2: Convert to fraction form
    276,681.60/415,022.40 = 87,165.90/x
  3. Step 3: Cross multiply
    276,681.60x = 415,022.40 × 87,165.90
  4. Step 4: Simplify right side
    276,681.60x = 36,175,801,016.16
  5. Step 5: Solve for x
    x = 36,175,801,016.16/276,681.60
  6. Step 6: Final answer
    x = 130,748.85

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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.