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Finding the Fourth Proportional to 123,213, 170,034 and 66,624.36

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Solution

The fourth proportional to 123,213, 170,034 and 66,624.36 is: 91,941.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,213 : 170,034 = 66,624.36 : x
  2. Step 2: Convert to fraction form
    123,213/170,034 = 66,624.36/x
  3. Step 3: Cross multiply
    123,213x = 170,034 × 66,624.36
  4. Step 4: Simplify right side
    123,213x = 11,328,406,428.24
  5. Step 5: Solve for x
    x = 11,328,406,428.24/123,213
  6. Step 6: Final answer
    x = 91,941.65

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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.