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Finding the Fourth Proportional to 74,044.80, 111,326.40 and 72,489.60

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Solution

The fourth proportional to 74,044.80, 111,326.40 and 72,489.60 is: 108,988.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,044.80 : 111,326.40 = 72,489.60 : x
  2. Step 2: Convert to fraction form
    74,044.80/111,326.40 = 72,489.60/x
  3. Step 3: Cross multiply
    74,044.80x = 111,326.40 × 72,489.60
  4. Step 4: Simplify right side
    74,044.80x = 8,070,006,205.44
  5. Step 5: Solve for x
    x = 8,070,006,205.44/74,044.80
  6. Step 6: Final answer
    x = 108,988.16

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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.