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Finding the Fourth Proportional to 98,689.64, 136,182.90 and 55,672.28

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Solution

The fourth proportional to 98,689.64, 136,182.90 and 55,672.28 is: 76,822.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,689.64 : 136,182.90 = 55,672.28 : x
  2. Step 2: Convert to fraction form
    98,689.64/136,182.90 = 55,672.28/x
  3. Step 3: Cross multiply
    98,689.64x = 136,182.90 × 55,672.28
  4. Step 4: Simplify right side
    98,689.64x = 7,581,612,540.01
  5. Step 5: Solve for x
    x = 7,581,612,540.01/98,689.64
  6. Step 6: Final answer
    x = 76,822.78

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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.