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Finding the Fourth Proportional to 91,279.36, 136,934.61 and 40,696.74

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Solution

The fourth proportional to 91,279.36, 136,934.61 and 40,696.74 is: 61,052.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,279.36 : 136,934.61 = 40,696.74 : x
  2. Step 2: Convert to fraction form
    91,279.36/136,934.61 = 40,696.74/x
  3. Step 3: Cross multiply
    91,279.36x = 136,934.61 × 40,696.74
  4. Step 4: Simplify right side
    91,279.36x = 5,572,792,220.17
  5. Step 5: Solve for x
    x = 5,572,792,220.17/91,279.36
  6. Step 6: Final answer
    x = 61,052.05

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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.