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Finding the Fourth Proportional to 74,352.56, 102,646.52 and 57,319.47

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Solution

The fourth proportional to 74,352.56, 102,646.52 and 57,319.47 is: 79,131.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,352.56 : 102,646.52 = 57,319.47 : x
  2. Step 2: Convert to fraction form
    74,352.56/102,646.52 = 57,319.47/x
  3. Step 3: Cross multiply
    74,352.56x = 102,646.52 × 57,319.47
  4. Step 4: Simplify right side
    74,352.56x = 5,883,643,837.15
  5. Step 5: Solve for x
    x = 5,883,643,837.15/74,352.56
  6. Step 6: Final answer
    x = 79,131.70

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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.