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Finding the Fourth Proportional to 60,606.20, 90,836.40 and 31,008.80

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Solution

The fourth proportional to 60,606.20, 90,836.40 and 31,008.80 is: 46,475.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,606.20 : 90,836.40 = 31,008.80 : x
  2. Step 2: Convert to fraction form
    60,606.20/90,836.40 = 31,008.80/x
  3. Step 3: Cross multiply
    60,606.20x = 90,836.40 × 31,008.80
  4. Step 4: Simplify right side
    60,606.20x = 2,816,727,760.32
  5. Step 5: Solve for x
    x = 2,816,727,760.32/60,606.20
  6. Step 6: Final answer
    x = 46,475.90

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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.