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Finding the Fourth Proportional to 251,680.80, 377,523.12 and 91,871.28

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Solution

The fourth proportional to 251,680.80, 377,523.12 and 91,871.28 is: 137,807.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,680.80 : 377,523.12 = 91,871.28 : x
  2. Step 2: Convert to fraction form
    251,680.80/377,523.12 = 91,871.28/x
  3. Step 3: Cross multiply
    251,680.80x = 377,523.12 × 91,871.28
  4. Step 4: Simplify right side
    251,680.80x = 34,683,532,263.99
  5. Step 5: Solve for x
    x = 34,683,532,263.99/251,680.80
  6. Step 6: Final answer
    x = 137,807.62

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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.