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Finding the Fourth Proportional to 71,195.60, 98,315.16 and 57,151.28

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Solution

The fourth proportional to 71,195.60, 98,315.16 and 57,151.28 is: 78,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,195.60 : 98,315.16 = 57,151.28 : x
  2. Step 2: Convert to fraction form
    71,195.60/98,315.16 = 57,151.28/x
  3. Step 3: Cross multiply
    71,195.60x = 98,315.16 × 57,151.28
  4. Step 4: Simplify right side
    71,195.60x = 5,618,837,237.40
  5. Step 5: Solve for x
    x = 5,618,837,237.40/71,195.60
  6. Step 6: Final answer
    x = 78,921.13

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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.