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Finding the Fourth Proportional to 98,424.80, 147,637.20 and 91,815.20

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Solution

The fourth proportional to 98,424.80, 147,637.20 and 91,815.20 is: 137,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,424.80 : 147,637.20 = 91,815.20 : x
  2. Step 2: Convert to fraction form
    98,424.80/147,637.20 = 91,815.20/x
  3. Step 3: Cross multiply
    98,424.80x = 147,637.20 × 91,815.20
  4. Step 4: Simplify right side
    98,424.80x = 13,555,339,045.44
  5. Step 5: Solve for x
    x = 13,555,339,045.44/98,424.80
  6. Step 6: Final answer
    x = 137,722.80

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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.