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Finding the Fourth Proportional to 136,697.93, 188,642.87 and 76,264.97

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Solution

The fourth proportional to 136,697.93, 188,642.87 and 76,264.97 is: 105,245.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,697.93 : 188,642.87 = 76,264.97 : x
  2. Step 2: Convert to fraction form
    136,697.93/188,642.87 = 76,264.97/x
  3. Step 3: Cross multiply
    136,697.93x = 188,642.87 × 76,264.97
  4. Step 4: Simplify right side
    136,697.93x = 14,386,842,821.26
  5. Step 5: Solve for x
    x = 14,386,842,821.26/136,697.93
  6. Step 6: Final answer
    x = 105,245.51

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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.