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Finding the Fourth Proportional to 85,266.95, 117,676.70 and 63,719.28

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Solution

The fourth proportional to 85,266.95, 117,676.70 and 63,719.28 is: 87,938.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,266.95 : 117,676.70 = 63,719.28 : x
  2. Step 2: Convert to fraction form
    85,266.95/117,676.70 = 63,719.28/x
  3. Step 3: Cross multiply
    85,266.95x = 117,676.70 × 63,719.28
  4. Step 4: Simplify right side
    85,266.95x = 7,498,274,278.18
  5. Step 5: Solve for x
    x = 7,498,274,278.18/85,266.95
  6. Step 6: Final answer
    x = 87,938.82

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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.