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Finding the Fourth Proportional to 54,658.80, 81,988.20 and 31,287.60

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Solution

The fourth proportional to 54,658.80, 81,988.20 and 31,287.60 is: 46,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,658.80 : 81,988.20 = 31,287.60 : x
  2. Step 2: Convert to fraction form
    54,658.80/81,988.20 = 31,287.60/x
  3. Step 3: Cross multiply
    54,658.80x = 81,988.20 × 31,287.60
  4. Step 4: Simplify right side
    54,658.80x = 2,565,214,006.32
  5. Step 5: Solve for x
    x = 2,565,214,006.32/54,658.80
  6. Step 6: Final answer
    x = 46,931.40

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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.