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Finding the Fourth Proportional to 125,838.72, 173,658.21 and 68,478.51

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Solution

The fourth proportional to 125,838.72, 173,658.21 and 68,478.51 is: 94,500.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,838.72 : 173,658.21 = 68,478.51 : x
  2. Step 2: Convert to fraction form
    125,838.72/173,658.21 = 68,478.51/x
  3. Step 3: Cross multiply
    125,838.72x = 173,658.21 × 68,478.51
  4. Step 4: Simplify right side
    125,838.72x = 11,891,855,470.07
  5. Step 5: Solve for x
    x = 11,891,855,470.07/125,838.72
  6. Step 6: Final answer
    x = 94,500.77

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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.