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Finding the Fourth Proportional to 74,680.65, 103,058.72 and 40,689.03

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Solution

The fourth proportional to 74,680.65, 103,058.72 and 40,689.03 is: 56,150.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,680.65 : 103,058.72 = 40,689.03 : x
  2. Step 2: Convert to fraction form
    74,680.65/103,058.72 = 40,689.03/x
  3. Step 3: Cross multiply
    74,680.65x = 103,058.72 × 40,689.03
  4. Step 4: Simplify right side
    74,680.65x = 4,193,359,349.84
  5. Step 5: Solve for x
    x = 4,193,359,349.84/74,680.65
  6. Step 6: Final answer
    x = 56,150.55

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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.