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Finding the Fourth Proportional to 125,482.10, 173,168.34 and 68,123.78

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Solution

The fourth proportional to 125,482.10, 173,168.34 and 68,123.78 is: 94,012.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,482.10 : 173,168.34 = 68,123.78 : x
  2. Step 2: Convert to fraction form
    125,482.10/173,168.34 = 68,123.78/x
  3. Step 3: Cross multiply
    125,482.10x = 173,168.34 × 68,123.78
  4. Step 4: Simplify right side
    125,482.10x = 11,796,881,897.13
  5. Step 5: Solve for x
    x = 11,796,881,897.13/125,482.10
  6. Step 6: Final answer
    x = 94,012.47

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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.