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Finding the Fourth Proportional to 98,234.20, 147,351.30 and 71,990.20

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Solution

The fourth proportional to 98,234.20, 147,351.30 and 71,990.20 is: 107,985.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,234.20 : 147,351.30 = 71,990.20 : x
  2. Step 2: Convert to fraction form
    98,234.20/147,351.30 = 71,990.20/x
  3. Step 3: Cross multiply
    98,234.20x = 147,351.30 × 71,990.20
  4. Step 4: Simplify right side
    98,234.20x = 10,607,849,557.26
  5. Step 5: Solve for x
    x = 10,607,849,557.26/98,234.20
  6. Step 6: Final answer
    x = 107,985.30

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1.5x scale

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.