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Finding the Fourth Proportional to 251,139.40, 376,709.10 and 84,927.40

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Solution

The fourth proportional to 251,139.40, 376,709.10 and 84,927.40 is: 127,391.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,139.40 : 376,709.10 = 84,927.40 : x
  2. Step 2: Convert to fraction form
    251,139.40/376,709.10 = 84,927.40/x
  3. Step 3: Cross multiply
    251,139.40x = 376,709.10 × 84,927.40
  4. Step 4: Simplify right side
    251,139.40x = 31,992,924,419.34
  5. Step 5: Solve for x
    x = 31,992,924,419.34/251,139.40
  6. Step 6: Final answer
    x = 127,391.10

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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.