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Finding the Fourth Proportional to 91,891.79, 137,772.88 and 35,685.08

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Solution

The fourth proportional to 91,891.79, 137,772.88 and 35,685.08 is: 53,502.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,891.79 : 137,772.88 = 35,685.08 : x
  2. Step 2: Convert to fraction form
    91,891.79/137,772.88 = 35,685.08/x
  3. Step 3: Cross multiply
    91,891.79x = 137,772.88 × 35,685.08
  4. Step 4: Simplify right side
    91,891.79x = 4,916,436,244.63
  5. Step 5: Solve for x
    x = 4,916,436,244.63/91,891.79
  6. Step 6: Final answer
    x = 53,502.45

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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.