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Finding the Fourth Proportional to 122,488.32, 169,076.48 and 72,184

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Solution

The fourth proportional to 122,488.32, 169,076.48 and 72,184 is: 99,639.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,488.32 : 169,076.48 = 72,184 : x
  2. Step 2: Convert to fraction form
    122,488.32/169,076.48 = 72,184/x
  3. Step 3: Cross multiply
    122,488.32x = 169,076.48 × 72,184
  4. Step 4: Simplify right side
    122,488.32x = 12,204,616,632.32
  5. Step 5: Solve for x
    x = 12,204,616,632.32/122,488.32
  6. Step 6: Final answer
    x = 99,639.02

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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.