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Finding the Fourth Proportional to 103,757.65, 155,776.40 and 66,390.66

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Solution

The fourth proportional to 103,757.65, 155,776.40 and 66,390.66 is: 99,675.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,757.65 : 155,776.40 = 66,390.66 : x
  2. Step 2: Convert to fraction form
    103,757.65/155,776.40 = 66,390.66/x
  3. Step 3: Cross multiply
    103,757.65x = 155,776.40 × 66,390.66
  4. Step 4: Simplify right side
    103,757.65x = 10,342,096,897.59
  5. Step 5: Solve for x
    x = 10,342,096,897.59/103,757.65
  6. Step 6: Final answer
    x = 99,675.52

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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.