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Finding the Fourth Proportional to 98,311.81, 147,128.88 and 60,335.88

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Solution

The fourth proportional to 98,311.81, 147,128.88 and 60,335.88 is: 90,295.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,311.81 : 147,128.88 = 60,335.88 : x
  2. Step 2: Convert to fraction form
    98,311.81/147,128.88 = 60,335.88/x
  3. Step 3: Cross multiply
    98,311.81x = 147,128.88 × 60,335.88
  4. Step 4: Simplify right side
    98,311.81x = 8,877,150,448.21
  5. Step 5: Solve for x
    x = 8,877,150,448.21/98,311.81
  6. Step 6: Final answer
    x = 90,295.87

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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.