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Finding the Fourth Proportional to 120,392.52, 166,143.15 and 66,678.45

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Solution

The fourth proportional to 120,392.52, 166,143.15 and 66,678.45 is: 92,017.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,392.52 : 166,143.15 = 66,678.45 : x
  2. Step 2: Convert to fraction form
    120,392.52/166,143.15 = 66,678.45/x
  3. Step 3: Cross multiply
    120,392.52x = 166,143.15 × 66,678.45
  4. Step 4: Simplify right side
    120,392.52x = 11,078,167,720.12
  5. Step 5: Solve for x
    x = 11,078,167,720.12/120,392.52
  6. Step 6: Final answer
    x = 92,017.08

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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.