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Finding the Fourth Proportional to 73,189.80, 101,002.28 and 39,655.80

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Solution

The fourth proportional to 73,189.80, 101,002.28 and 39,655.80 is: 54,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,189.80 : 101,002.28 = 39,655.80 : x
  2. Step 2: Convert to fraction form
    73,189.80/101,002.28 = 39,655.80/x
  3. Step 3: Cross multiply
    73,189.80x = 101,002.28 × 39,655.80
  4. Step 4: Simplify right side
    73,189.80x = 4,005,326,215.22
  5. Step 5: Solve for x
    x = 4,005,326,215.22/73,189.80
  6. Step 6: Final answer
    x = 54,725.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.