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Finding the Fourth Proportional to 73,039.65, 109,345.95 and 66,035.79

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Solution

The fourth proportional to 73,039.65, 109,345.95 and 66,035.79 is: 98,860.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,039.65 : 109,345.95 = 66,035.79 : x
  2. Step 2: Convert to fraction form
    73,039.65/109,345.95 = 66,035.79/x
  3. Step 3: Cross multiply
    73,039.65x = 109,345.95 × 66,035.79
  4. Step 4: Simplify right side
    73,039.65x = 7,220,746,191.55
  5. Step 5: Solve for x
    x = 7,220,746,191.55/73,039.65
  6. Step 6: Final answer
    x = 98,860.64

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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.