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Finding the Fourth Proportional to 251,386.64, 376,981.12 and 91,424.60

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Solution

The fourth proportional to 251,386.64, 376,981.12 and 91,424.60 is: 137,100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,386.64 : 376,981.12 = 91,424.60 : x
  2. Step 2: Convert to fraction form
    251,386.64/376,981.12 = 91,424.60/x
  3. Step 3: Cross multiply
    251,386.64x = 376,981.12 × 91,424.60
  4. Step 4: Simplify right side
    251,386.64x = 34,465,348,103.55
  5. Step 5: Solve for x
    x = 34,465,348,103.55/251,386.64
  6. Step 6: Final answer
    x = 137,100.95

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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.