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Finding the Fourth Proportional to 98,423.80, 147,635.70 and 91,814.20

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Solution

The fourth proportional to 98,423.80, 147,635.70 and 91,814.20 is: 137,721.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,423.80 : 147,635.70 = 91,814.20 : x
  2. Step 2: Convert to fraction form
    98,423.80/147,635.70 = 91,814.20/x
  3. Step 3: Cross multiply
    98,423.80x = 147,635.70 × 91,814.20
  4. Step 4: Simplify right side
    98,423.80x = 13,555,053,686.94
  5. Step 5: Solve for x
    x = 13,555,053,686.94/98,423.80
  6. Step 6: Final answer
    x = 137,721.30

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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.