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Finding the Fourth Proportional to 73,109.10, 109,663.65 and 60,643.20

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Solution

The fourth proportional to 73,109.10, 109,663.65 and 60,643.20 is: 90,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,109.10 : 109,663.65 = 60,643.20 : x
  2. Step 2: Convert to fraction form
    73,109.10/109,663.65 = 60,643.20/x
  3. Step 3: Cross multiply
    73,109.10x = 109,663.65 × 60,643.20
  4. Step 4: Simplify right side
    73,109.10x = 6,650,354,659.68
  5. Step 5: Solve for x
    x = 6,650,354,659.68/73,109.10
  6. Step 6: Final answer
    x = 90,964.80

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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.