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Finding the Fourth Proportional to 98,405.28, 147,629.79 and 28,279.13

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Solution

The fourth proportional to 98,405.28, 147,629.79 and 28,279.13 is: 42,424.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,405.28 : 147,629.79 = 28,279.13 : x
  2. Step 2: Convert to fraction form
    98,405.28/147,629.79 = 28,279.13/x
  3. Step 3: Cross multiply
    98,405.28x = 147,629.79 × 28,279.13
  4. Step 4: Simplify right side
    98,405.28x = 4,174,841,285.13
  5. Step 5: Solve for x
    x = 4,174,841,285.13/98,405.28
  6. Step 6: Final answer
    x = 42,424.97

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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.