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Finding the Fourth Proportional to 71,018.57, 97,964.30 and 45,515.90

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Solution

The fourth proportional to 71,018.57, 97,964.30 and 45,515.90 is: 62,785.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,018.57 : 97,964.30 = 45,515.90 : x
  2. Step 2: Convert to fraction form
    71,018.57/97,964.30 = 45,515.90/x
  3. Step 3: Cross multiply
    71,018.57x = 97,964.30 × 45,515.90
  4. Step 4: Simplify right side
    71,018.57x = 4,458,932,564.97
  5. Step 5: Solve for x
    x = 4,458,932,564.97/71,018.57
  6. Step 6: Final answer
    x = 62,785.45

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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.