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Finding the Fourth Proportional to 60,460.80, 90,691.20 and 18,902.40

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Solution

The fourth proportional to 60,460.80, 90,691.20 and 18,902.40 is: 28,353.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,460.80 : 90,691.20 = 18,902.40 : x
  2. Step 2: Convert to fraction form
    60,460.80/90,691.20 = 18,902.40/x
  3. Step 3: Cross multiply
    60,460.80x = 90,691.20 × 18,902.40
  4. Step 4: Simplify right side
    60,460.80x = 1,714,281,338.88
  5. Step 5: Solve for x
    x = 1,714,281,338.88/60,460.80
  6. Step 6: Final answer
    x = 28,353.60

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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.