Home / 65,731.20-98,596.80-21,359.40

Finding the Fourth Proportional to 65,731.20, 98,596.80 and 21,359.40

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Solution

The fourth proportional to 65,731.20, 98,596.80 and 21,359.40 is: 32,039.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,731.20 : 98,596.80 = 21,359.40 : x
  2. Step 2: Convert to fraction form
    65,731.20/98,596.80 = 21,359.40/x
  3. Step 3: Cross multiply
    65,731.20x = 98,596.80 × 21,359.40
  4. Step 4: Simplify right side
    65,731.20x = 2,105,968,489.92
  5. Step 5: Solve for x
    x = 2,105,968,489.92/65,731.20
  6. Step 6: Final answer
    x = 32,039.10

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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.