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Finding the Fourth Proportional to 206,759.65, 310,139.48 and 66,532.45

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Solution

The fourth proportional to 206,759.65, 310,139.48 and 66,532.45 is: 99,798.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,759.65 : 310,139.48 = 66,532.45 : x
  2. Step 2: Convert to fraction form
    206,759.65/310,139.48 = 66,532.45/x
  3. Step 3: Cross multiply
    206,759.65x = 310,139.48 × 66,532.45
  4. Step 4: Simplify right side
    206,759.65x = 20,634,339,113.46
  5. Step 5: Solve for x
    x = 20,634,339,113.46/206,759.65
  6. Step 6: Final answer
    x = 99,798.68

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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.