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Finding the Fourth Proportional to 40,888.60, 61,304.10 and 18,712.60

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Solution

The fourth proportional to 40,888.60, 61,304.10 and 18,712.60 is: 28,055.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,888.60 : 61,304.10 = 18,712.60 : x
  2. Step 2: Convert to fraction form
    40,888.60/61,304.10 = 18,712.60/x
  3. Step 3: Cross multiply
    40,888.60x = 61,304.10 × 18,712.60
  4. Step 4: Simplify right side
    40,888.60x = 1,147,159,101.66
  5. Step 5: Solve for x
    x = 1,147,159,101.66/40,888.60
  6. Step 6: Final answer
    x = 28,055.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.