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Finding the Fourth Proportional to 80,465.60, 120,698.40 and 43,140.80

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Solution

The fourth proportional to 80,465.60, 120,698.40 and 43,140.80 is: 64,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,465.60 : 120,698.40 = 43,140.80 : x
  2. Step 2: Convert to fraction form
    80,465.60/120,698.40 = 43,140.80/x
  3. Step 3: Cross multiply
    80,465.60x = 120,698.40 × 43,140.80
  4. Step 4: Simplify right side
    80,465.60x = 5,207,025,534.72
  5. Step 5: Solve for x
    x = 5,207,025,534.72/80,465.60
  6. Step 6: Final answer
    x = 64,711.20

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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.