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Finding the Fourth Proportional to 69,028.80, 103,543.20 and 66,623.10

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Solution

The fourth proportional to 69,028.80, 103,543.20 and 66,623.10 is: 99,934.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,028.80 : 103,543.20 = 66,623.10 : x
  2. Step 2: Convert to fraction form
    69,028.80/103,543.20 = 66,623.10/x
  3. Step 3: Cross multiply
    69,028.80x = 103,543.20 × 66,623.10
  4. Step 4: Simplify right side
    69,028.80x = 6,898,368,967.92
  5. Step 5: Solve for x
    x = 6,898,368,967.92/69,028.80
  6. Step 6: Final answer
    x = 99,934.65

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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.