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Finding the Fourth Proportional to 79,618.32, 109,873.92 and 43,320

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Solution

The fourth proportional to 79,618.32, 109,873.92 and 43,320 is: 59,781.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,618.32 : 109,873.92 = 43,320 : x
  2. Step 2: Convert to fraction form
    79,618.32/109,873.92 = 43,320/x
  3. Step 3: Cross multiply
    79,618.32x = 109,873.92 × 43,320
  4. Step 4: Simplify right side
    79,618.32x = 4,759,738,214.40
  5. Step 5: Solve for x
    x = 4,759,738,214.40/79,618.32
  6. Step 6: Final answer
    x = 59,781.95

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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.