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Finding the Fourth Proportional to 123,486.29, 170,411.04 and 66,897.66

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Solution

The fourth proportional to 123,486.29, 170,411.04 and 66,897.66 is: 92,318.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,486.29 : 170,411.04 = 66,897.66 : x
  2. Step 2: Convert to fraction form
    123,486.29/170,411.04 = 66,897.66/x
  3. Step 3: Cross multiply
    123,486.29x = 170,411.04 × 66,897.66
  4. Step 4: Simplify right side
    123,486.29x = 11,400,099,814.17
  5. Step 5: Solve for x
    x = 11,400,099,814.17/123,486.29
  6. Step 6: Final answer
    x = 92,318.75

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1.5x scale

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.