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Finding the Fourth Proportional to 74,504.40, 102,854.17 and 57,470.40

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Solution

The fourth proportional to 74,504.40, 102,854.17 and 57,470.40 is: 79,338.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,504.40 : 102,854.17 = 57,470.40 : x
  2. Step 2: Convert to fraction form
    74,504.40/102,854.17 = 57,470.40/x
  3. Step 3: Cross multiply
    74,504.40x = 102,854.17 × 57,470.40
  4. Step 4: Simplify right side
    74,504.40x = 5,911,070,147.89
  5. Step 5: Solve for x
    x = 5,911,070,147.89/74,504.40
  6. Step 6: Final answer
    x = 79,338.54

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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.