Home / 72,419.20-108,531.60-51,618.40

Finding the Fourth Proportional to 72,419.20, 108,531.60 and 51,618.40

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Solution

The fourth proportional to 72,419.20, 108,531.60 and 51,618.40 is: 77,358.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,419.20 : 108,531.60 = 51,618.40 : x
  2. Step 2: Convert to fraction form
    72,419.20/108,531.60 = 51,618.40/x
  3. Step 3: Cross multiply
    72,419.20x = 108,531.60 × 51,618.40
  4. Step 4: Simplify right side
    72,419.20x = 5,602,227,541.44
  5. Step 5: Solve for x
    x = 5,602,227,541.44/72,419.20
  6. Step 6: Final answer
    x = 77,358.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.