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Finding the Fourth Proportional to 98,993.70, 136,598.28 and 55,979.10

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Solution

The fourth proportional to 98,993.70, 136,598.28 and 55,979.10 is: 77,243.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,993.70 : 136,598.28 = 55,979.10 : x
  2. Step 2: Convert to fraction form
    98,993.70/136,598.28 = 55,979.10/x
  3. Step 3: Cross multiply
    98,993.70x = 136,598.28 × 55,979.10
  4. Step 4: Simplify right side
    98,993.70x = 7,646,648,775.95
  5. Step 5: Solve for x
    x = 7,646,648,775.95/98,993.70
  6. Step 6: Final answer
    x = 77,243.79

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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.