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Finding the Fourth Proportional to 42,138.80, 58,151.74 and 23,018.84

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Solution

The fourth proportional to 42,138.80, 58,151.74 and 23,018.84 is: 31,766.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,138.80 : 58,151.74 = 23,018.84 : x
  2. Step 2: Convert to fraction form
    42,138.80/58,151.74 = 23,018.84/x
  3. Step 3: Cross multiply
    42,138.80x = 58,151.74 × 23,018.84
  4. Step 4: Simplify right side
    42,138.80x = 1,338,585,308.02
  5. Step 5: Solve for x
    x = 1,338,585,308.02/42,138.80
  6. Step 6: Final answer
    x = 31,766.10

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.