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Finding the Fourth Proportional to 71,357.56, 98,520.78 and 66,897.16

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Solution

The fourth proportional to 71,357.56, 98,520.78 and 66,897.16 is: 92,362.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,357.56 : 98,520.78 = 66,897.16 : x
  2. Step 2: Convert to fraction form
    71,357.56/98,520.78 = 66,897.16/x
  3. Step 3: Cross multiply
    71,357.56x = 98,520.78 × 66,897.16
  4. Step 4: Simplify right side
    71,357.56x = 6,590,760,382.98
  5. Step 5: Solve for x
    x = 6,590,760,382.98/71,357.56
  6. Step 6: Final answer
    x = 92,362.47

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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.