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Finding the Fourth Proportional to 83,368.61, 114,943.97 and 66,332.69

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Solution

The fourth proportional to 83,368.61, 114,943.97 and 66,332.69 is: 91,455.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,368.61 : 114,943.97 = 66,332.69 : x
  2. Step 2: Convert to fraction form
    83,368.61/114,943.97 = 66,332.69/x
  3. Step 3: Cross multiply
    83,368.61x = 114,943.97 × 66,332.69
  4. Step 4: Simplify right side
    83,368.61x = 7,624,542,397.72
  5. Step 5: Solve for x
    x = 7,624,542,397.72/83,368.61
  6. Step 6: Final answer
    x = 91,455.79

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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.