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Finding the Fourth Proportional to 71,278, 98,250.32 and 56,146.70

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Solution

The fourth proportional to 71,278, 98,250.32 and 56,146.70 is: 77,393.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,278 : 98,250.32 = 56,146.70 : x
  2. Step 2: Convert to fraction form
    71,278/98,250.32 = 56,146.70/x
  3. Step 3: Cross multiply
    71,278x = 98,250.32 × 56,146.70
  4. Step 4: Simplify right side
    71,278x = 5,516,431,241.94
  5. Step 5: Solve for x
    x = 5,516,431,241.94/71,278
  6. Step 6: Final answer
    x = 77,393.18

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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.