Home / 80,887.10-121,330.65-66,890.30

Finding the Fourth Proportional to 80,887.10, 121,330.65 and 66,890.30

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Solution

The fourth proportional to 80,887.10, 121,330.65 and 66,890.30 is: 100,335.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,887.10 : 121,330.65 = 66,890.30 : x
  2. Step 2: Convert to fraction form
    80,887.10/121,330.65 = 66,890.30/x
  3. Step 3: Cross multiply
    80,887.10x = 121,330.65 × 66,890.30
  4. Step 4: Simplify right side
    80,887.10x = 8,115,843,577.70
  5. Step 5: Solve for x
    x = 8,115,843,577.70/80,887.10
  6. Step 6: Final answer
    x = 100,335.45

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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.