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Finding the Fourth Proportional to 98,642.56, 148,284.60 and 79,134.52

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Solution

The fourth proportional to 98,642.56, 148,284.60 and 79,134.52 is: 118,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,642.56 : 148,284.60 = 79,134.52 : x
  2. Step 2: Convert to fraction form
    98,642.56/148,284.60 = 79,134.52/x
  3. Step 3: Cross multiply
    98,642.56x = 148,284.60 × 79,134.52
  4. Step 4: Simplify right side
    98,642.56x = 11,734,430,644.39
  5. Step 5: Solve for x
    x = 11,734,430,644.39/98,642.56
  6. Step 6: Final answer
    x = 118,959.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.