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Finding the Fourth Proportional to 125,643.78, 173,385.50 and 68,281.74

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Solution

The fourth proportional to 125,643.78, 173,385.50 and 68,281.74 is: 94,227.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,643.78 : 173,385.50 = 68,281.74 : x
  2. Step 2: Convert to fraction form
    125,643.78/173,385.50 = 68,281.74/x
  3. Step 3: Cross multiply
    125,643.78x = 173,385.50 × 68,281.74
  4. Step 4: Simplify right side
    125,643.78x = 11,839,063,289.36
  5. Step 5: Solve for x
    x = 11,839,063,289.36/125,643.78
  6. Step 6: Final answer
    x = 94,227.21

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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.