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Finding the Fourth Proportional to 251,403.50, 346,943.40 and 136,689.86

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Solution

The fourth proportional to 251,403.50, 346,943.40 and 136,689.86 is: 188,635.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,403.50 : 346,943.40 = 136,689.86 : x
  2. Step 2: Convert to fraction form
    251,403.50/346,943.40 = 136,689.86/x
  3. Step 3: Cross multiply
    251,403.50x = 346,943.40 × 136,689.86
  4. Step 4: Simplify right side
    251,403.50x = 47,423,644,773.92
  5. Step 5: Solve for x
    x = 47,423,644,773.92/251,403.50
  6. Step 6: Final answer
    x = 188,635.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.