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Finding the Fourth Proportional to 273,898.60, 410,919.90 and 86,909.80

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Solution

The fourth proportional to 273,898.60, 410,919.90 and 86,909.80 is: 130,387.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,898.60 : 410,919.90 = 86,909.80 : x
  2. Step 2: Convert to fraction form
    273,898.60/410,919.90 = 86,909.80/x
  3. Step 3: Cross multiply
    273,898.60x = 410,919.90 × 86,909.80
  4. Step 4: Simplify right side
    273,898.60x = 35,712,966,325.02
  5. Step 5: Solve for x
    x = 35,712,966,325.02/273,898.60
  6. Step 6: Final answer
    x = 130,387.55

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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.