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Finding the Fourth Proportional to 113,207.70, 169,920.90 and 68,920.95

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Solution

The fourth proportional to 113,207.70, 169,920.90 and 68,920.95 is: 103,448.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,207.70 : 169,920.90 = 68,920.95 : x
  2. Step 2: Convert to fraction form
    113,207.70/169,920.90 = 68,920.95/x
  3. Step 3: Cross multiply
    113,207.70x = 169,920.90 × 68,920.95
  4. Step 4: Simplify right side
    113,207.70x = 11,711,109,852.86
  5. Step 5: Solve for x
    x = 11,711,109,852.86/113,207.70
  6. Step 6: Final answer
    x = 103,448.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.