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Finding the Fourth Proportional to 101,631.57, 140,274.90 and 67,641.51

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Solution

The fourth proportional to 101,631.57, 140,274.90 and 67,641.51 is: 93,360.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,631.57 : 140,274.90 = 67,641.51 : x
  2. Step 2: Convert to fraction form
    101,631.57/140,274.90 = 67,641.51/x
  3. Step 3: Cross multiply
    101,631.57x = 140,274.90 × 67,641.51
  4. Step 4: Simplify right side
    101,631.57x = 9,488,406,051.10
  5. Step 5: Solve for x
    x = 9,488,406,051.10/101,631.57
  6. Step 6: Final answer
    x = 93,360.81

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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.