Home / 78,528.56-108,366.60-42,717.20

Finding the Fourth Proportional to 78,528.56, 108,366.60 and 42,717.20

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Solution

The fourth proportional to 78,528.56, 108,366.60 and 42,717.20 is: 58,948.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,528.56 : 108,366.60 = 42,717.20 : x
  2. Step 2: Convert to fraction form
    78,528.56/108,366.60 = 42,717.20/x
  3. Step 3: Cross multiply
    78,528.56x = 108,366.60 × 42,717.20
  4. Step 4: Simplify right side
    78,528.56x = 4,629,117,725.52
  5. Step 5: Solve for x
    x = 4,629,117,725.52/78,528.56
  6. Step 6: Final answer
    x = 58,948.21

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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.