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Finding the Fourth Proportional to 251,332.80, 376,926.30 and 91,390.20

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Solution

The fourth proportional to 251,332.80, 376,926.30 and 91,390.20 is: 137,058.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,332.80 : 376,926.30 = 91,390.20 : x
  2. Step 2: Convert to fraction form
    251,332.80/376,926.30 = 91,390.20/x
  3. Step 3: Cross multiply
    251,332.80x = 376,926.30 × 91,390.20
  4. Step 4: Simplify right side
    251,332.80x = 34,447,369,942.26
  5. Step 5: Solve for x
    x = 34,447,369,942.26/251,332.80
  6. Step 6: Final answer
    x = 137,058.79

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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.