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Finding the Fourth Proportional to 80,808.60, 121,212.90 and 59,813.40

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Solution

The fourth proportional to 80,808.60, 121,212.90 and 59,813.40 is: 89,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,808.60 : 121,212.90 = 59,813.40 : x
  2. Step 2: Convert to fraction form
    80,808.60/121,212.90 = 59,813.40/x
  3. Step 3: Cross multiply
    80,808.60x = 121,212.90 × 59,813.40
  4. Step 4: Simplify right side
    80,808.60x = 7,250,155,672.86
  5. Step 5: Solve for x
    x = 7,250,155,672.86/80,808.60
  6. Step 6: Final answer
    x = 89,720.10

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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.