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Finding the Fourth Proportional to 66,342.65, 91,538.03 and 55,630.85

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Solution

The fourth proportional to 66,342.65, 91,538.03 and 55,630.85 is: 76,758.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,342.65 : 91,538.03 = 55,630.85 : x
  2. Step 2: Convert to fraction form
    66,342.65/91,538.03 = 55,630.85/x
  3. Step 3: Cross multiply
    66,342.65x = 91,538.03 × 55,630.85
  4. Step 4: Simplify right side
    66,342.65x = 5,092,338,097.61
  5. Step 5: Solve for x
    x = 5,092,338,097.61/66,342.65
  6. Step 6: Final answer
    x = 76,758.14

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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.