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Finding the Fourth Proportional to 79,781.60, 119,672.40 and 54,898.40

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Solution

The fourth proportional to 79,781.60, 119,672.40 and 54,898.40 is: 82,347.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,781.60 : 119,672.40 = 54,898.40 : x
  2. Step 2: Convert to fraction form
    79,781.60/119,672.40 = 54,898.40/x
  3. Step 3: Cross multiply
    79,781.60x = 119,672.40 × 54,898.40
  4. Step 4: Simplify right side
    79,781.60x = 6,569,823,284.16
  5. Step 5: Solve for x
    x = 6,569,823,284.16/79,781.60
  6. Step 6: Final answer
    x = 82,347.60

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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.