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Finding the Fourth Proportional to 125,857.90, 173,678.79 and 69,269.50

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Solution

The fourth proportional to 125,857.90, 173,678.79 and 69,269.50 is: 95,589.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,857.90 : 173,678.79 = 69,269.50 : x
  2. Step 2: Convert to fraction form
    125,857.90/173,678.79 = 69,269.50/x
  3. Step 3: Cross multiply
    125,857.90x = 173,678.79 × 69,269.50
  4. Step 4: Simplify right side
    125,857.90x = 12,030,642,943.91
  5. Step 5: Solve for x
    x = 12,030,642,943.91/125,857.90
  6. Step 6: Final answer
    x = 95,589.10

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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.