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Finding the Fourth Proportional to 261,371.68, 391,876.08 and 143,098.72

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Solution

The fourth proportional to 261,371.68, 391,876.08 and 143,098.72 is: 214,548.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,371.68 : 391,876.08 = 143,098.72 : x
  2. Step 2: Convert to fraction form
    261,371.68/391,876.08 = 143,098.72/x
  3. Step 3: Cross multiply
    261,371.68x = 391,876.08 × 143,098.72
  4. Step 4: Simplify right side
    261,371.68x = 56,076,965,446.62
  5. Step 5: Solve for x
    x = 56,076,965,446.62/261,371.68
  6. Step 6: Final answer
    x = 214,548.74

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1.5x scale

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.