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Finding the Fourth Proportional to 84,454.88, 116,689.56 and 66,686.72

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Solution

The fourth proportional to 84,454.88, 116,689.56 and 66,686.72 is: 92,139.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,454.88 : 116,689.56 = 66,686.72 : x
  2. Step 2: Convert to fraction form
    84,454.88/116,689.56 = 66,686.72/x
  3. Step 3: Cross multiply
    84,454.88x = 116,689.56 × 66,686.72
  4. Step 4: Simplify right side
    84,454.88x = 7,781,644,014.64
  5. Step 5: Solve for x
    x = 7,781,644,014.64/84,454.88
  6. Step 6: Final answer
    x = 92,139.66

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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.