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Finding the Fourth Proportional to 98,779.28, 136,318.60 and 54,067.28

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Solution

The fourth proportional to 98,779.28, 136,318.60 and 54,067.28 is: 74,614.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,779.28 : 136,318.60 = 54,067.28 : x
  2. Step 2: Convert to fraction form
    98,779.28/136,318.60 = 54,067.28/x
  3. Step 3: Cross multiply
    98,779.28x = 136,318.60 × 54,067.28
  4. Step 4: Simplify right side
    98,779.28x = 7,370,375,915.41
  5. Step 5: Solve for x
    x = 7,370,375,915.41/98,779.28
  6. Step 6: Final answer
    x = 74,614.59

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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.