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Finding the Fourth Proportional to 89,862.40, 134,793.60 and 82,280.80

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Solution

The fourth proportional to 89,862.40, 134,793.60 and 82,280.80 is: 123,421.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,862.40 : 134,793.60 = 82,280.80 : x
  2. Step 2: Convert to fraction form
    89,862.40/134,793.60 = 82,280.80/x
  3. Step 3: Cross multiply
    89,862.40x = 134,793.60 × 82,280.80
  4. Step 4: Simplify right side
    89,862.40x = 11,090,925,242.88
  5. Step 5: Solve for x
    x = 11,090,925,242.88/89,862.40
  6. Step 6: Final answer
    x = 123,421.20

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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.