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Finding the Fourth Proportional to 98,298.21, 147,298.68 and 73,220.61

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Solution

The fourth proportional to 98,298.21, 147,298.68 and 73,220.61 is: 109,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,298.21 : 147,298.68 = 73,220.61 : x
  2. Step 2: Convert to fraction form
    98,298.21/147,298.68 = 73,220.61/x
  3. Step 3: Cross multiply
    98,298.21x = 147,298.68 × 73,220.61
  4. Step 4: Simplify right side
    98,298.21x = 10,785,299,201.79
  5. Step 5: Solve for x
    x = 10,785,299,201.79/98,298.21
  6. Step 6: Final answer
    x = 109,720.20

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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.