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Finding the Fourth Proportional to 138,035.13, 207,101.29 and 67,963.65

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Solution

The fourth proportional to 138,035.13, 207,101.29 and 67,963.65 is: 101,969.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,035.13 : 207,101.29 = 67,963.65 : x
  2. Step 2: Convert to fraction form
    138,035.13/207,101.29 = 67,963.65/x
  3. Step 3: Cross multiply
    138,035.13x = 207,101.29 × 67,963.65
  4. Step 4: Simplify right side
    138,035.13x = 14,075,359,588.11
  5. Step 5: Solve for x
    x = 14,075,359,588.11/138,035.13
  6. Step 6: Final answer
    x = 101,969.40

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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.