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Finding the Fourth Proportional to 98,479.34, 135,964.34 and 80,373.32

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Solution

The fourth proportional to 98,479.34, 135,964.34 and 80,373.32 is: 110,966.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,479.34 : 135,964.34 = 80,373.32 : x
  2. Step 2: Convert to fraction form
    98,479.34/135,964.34 = 80,373.32/x
  3. Step 3: Cross multiply
    98,479.34x = 135,964.34 × 80,373.32
  4. Step 4: Simplify right side
    98,479.34x = 10,927,904,727.59
  5. Step 5: Solve for x
    x = 10,927,904,727.59/98,479.34
  6. Step 6: Final answer
    x = 110,966.47

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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.