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Finding the Fourth Proportional to 125,266.50, 172,867.80 and 68,678.28

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Solution

The fourth proportional to 125,266.50, 172,867.80 and 68,678.28 is: 94,776.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,266.50 : 172,867.80 = 68,678.28 : x
  2. Step 2: Convert to fraction form
    125,266.50/172,867.80 = 68,678.28/x
  3. Step 3: Cross multiply
    125,266.50x = 172,867.80 × 68,678.28
  4. Step 4: Simplify right side
    125,266.50x = 11,872,263,171.38
  5. Step 5: Solve for x
    x = 11,872,263,171.38/125,266.50
  6. Step 6: Final answer
    x = 94,776.04

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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.