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Finding the Fourth Proportional to 207,338.67, 286,391.43 and 158,643.90

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Solution

The fourth proportional to 207,338.67, 286,391.43 and 158,643.90 is: 219,130.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,338.67 : 286,391.43 = 158,643.90 : x
  2. Step 2: Convert to fraction form
    207,338.67/286,391.43 = 158,643.90/x
  3. Step 3: Cross multiply
    207,338.67x = 286,391.43 × 158,643.90
  4. Step 4: Simplify right side
    207,338.67x = 45,434,253,381.78
  5. Step 5: Solve for x
    x = 45,434,253,381.78/207,338.67
  6. Step 6: Final answer
    x = 219,130.63

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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.