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Finding the Fourth Proportional to 123,486.36, 170,411.16 and 66,897.72

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Solution

The fourth proportional to 123,486.36, 170,411.16 and 66,897.72 is: 92,318.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,486.36 : 170,411.16 = 66,897.72 : x
  2. Step 2: Convert to fraction form
    123,486.36/170,411.16 = 66,897.72/x
  3. Step 3: Cross multiply
    123,486.36x = 170,411.16 × 66,897.72
  4. Step 4: Simplify right side
    123,486.36x = 11,400,118,066.56
  5. Step 5: Solve for x
    x = 11,400,118,066.56/123,486.36
  6. Step 6: Final answer
    x = 92,318.84

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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.