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Finding the Fourth Proportional to 123,808.65, 170,855.92 and 67,220.02

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Solution

The fourth proportional to 123,808.65, 170,855.92 and 67,220.02 is: 92,763.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,808.65 : 170,855.92 = 67,220.02 : x
  2. Step 2: Convert to fraction form
    123,808.65/170,855.92 = 67,220.02/x
  3. Step 3: Cross multiply
    123,808.65x = 170,855.92 × 67,220.02
  4. Step 4: Simplify right side
    123,808.65x = 11,484,938,657.11
  5. Step 5: Solve for x
    x = 11,484,938,657.11/123,808.65
  6. Step 6: Final answer
    x = 92,763.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.