Home / 80,899.20-121,348.80-52,905.60

Finding the Fourth Proportional to 80,899.20, 121,348.80 and 52,905.60

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Solution

The fourth proportional to 80,899.20, 121,348.80 and 52,905.60 is: 79,358.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,899.20 : 121,348.80 = 52,905.60 : x
  2. Step 2: Convert to fraction form
    80,899.20/121,348.80 = 52,905.60/x
  3. Step 3: Cross multiply
    80,899.20x = 121,348.80 × 52,905.60
  4. Step 4: Simplify right side
    80,899.20x = 6,420,031,073.28
  5. Step 5: Solve for x
    x = 6,420,031,073.28/80,899.20
  6. Step 6: Final answer
    x = 79,358.40

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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.