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Finding the Fourth Proportional to 98,079.98, 135,346.28 and 55,646.51

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Solution

The fourth proportional to 98,079.98, 135,346.28 and 55,646.51 is: 76,789.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,079.98 : 135,346.28 = 55,646.51 : x
  2. Step 2: Convert to fraction form
    98,079.98/135,346.28 = 55,646.51/x
  3. Step 3: Cross multiply
    98,079.98x = 135,346.28 × 55,646.51
  4. Step 4: Simplify right side
    98,079.98x = 7,531,547,168.52
  5. Step 5: Solve for x
    x = 7,531,547,168.52/98,079.98
  6. Step 6: Final answer
    x = 76,789.86

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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.