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Finding the Fourth Proportional to 74,990.64, 103,510.14 and 43,180.74

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Solution

The fourth proportional to 74,990.64, 103,510.14 and 43,180.74 is: 59,602.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,990.64 : 103,510.14 = 43,180.74 : x
  2. Step 2: Convert to fraction form
    74,990.64/103,510.14 = 43,180.74/x
  3. Step 3: Cross multiply
    74,990.64x = 103,510.14 × 43,180.74
  4. Step 4: Simplify right side
    74,990.64x = 4,469,644,442.70
  5. Step 5: Solve for x
    x = 4,469,644,442.70/74,990.64
  6. Step 6: Final answer
    x = 59,602.70

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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.