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Finding the Fourth Proportional to 122,479.48, 169,007.16 and 68,752.72

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Solution

The fourth proportional to 122,479.48, 169,007.16 and 68,752.72 is: 94,870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,479.48 : 169,007.16 = 68,752.72 : x
  2. Step 2: Convert to fraction form
    122,479.48/169,007.16 = 68,752.72/x
  3. Step 3: Cross multiply
    122,479.48x = 169,007.16 × 68,752.72
  4. Step 4: Simplify right side
    122,479.48x = 11,619,701,949.48
  5. Step 5: Solve for x
    x = 11,619,701,949.48/122,479.48
  6. Step 6: Final answer
    x = 94,870.60

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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.