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Finding the Fourth Proportional to 267,478.61, 401,279.40 and 87,569.82

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Solution

The fourth proportional to 267,478.61, 401,279.40 and 87,569.82 is: 131,374.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,478.61 : 401,279.40 = 87,569.82 : x
  2. Step 2: Convert to fraction form
    267,478.61/401,279.40 = 87,569.82/x
  3. Step 3: Cross multiply
    267,478.61x = 401,279.40 × 87,569.82
  4. Step 4: Simplify right side
    267,478.61x = 35,139,964,827.71
  5. Step 5: Solve for x
    x = 35,139,964,827.71/267,478.61
  6. Step 6: Final answer
    x = 131,374.86

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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.