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Finding the Fourth Proportional to 73,189.64, 101,001.78 and 39,655.40

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Solution

The fourth proportional to 73,189.64, 101,001.78 and 39,655.40 is: 54,724.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,189.64 : 101,001.78 = 39,655.40 : x
  2. Step 2: Convert to fraction form
    73,189.64/101,001.78 = 39,655.40/x
  3. Step 3: Cross multiply
    73,189.64x = 101,001.78 × 39,655.40
  4. Step 4: Simplify right side
    73,189.64x = 4,005,265,986.61
  5. Step 5: Solve for x
    x = 4,005,265,986.61/73,189.64
  6. Step 6: Final answer
    x = 54,724.49

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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.