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Finding the Fourth Proportional to 71,193.60, 98,312.40 and 57,149.28

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Solution

The fourth proportional to 71,193.60, 98,312.40 and 57,149.28 is: 78,918.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,193.60 : 98,312.40 = 57,149.28 : x
  2. Step 2: Convert to fraction form
    71,193.60/98,312.40 = 57,149.28/x
  3. Step 3: Cross multiply
    71,193.60x = 98,312.40 × 57,149.28
  4. Step 4: Simplify right side
    71,193.60x = 5,618,482,875.07
  5. Step 5: Solve for x
    x = 5,618,482,875.07/71,193.60
  6. Step 6: Final answer
    x = 78,918.37

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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.