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Finding the Fourth Proportional to 122,711.40, 184,067.10 and 66,578.40

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Solution

The fourth proportional to 122,711.40, 184,067.10 and 66,578.40 is: 99,867.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,711.40 : 184,067.10 = 66,578.40 : x
  2. Step 2: Convert to fraction form
    122,711.40/184,067.10 = 66,578.40/x
  3. Step 3: Cross multiply
    122,711.40x = 184,067.10 × 66,578.40
  4. Step 4: Simplify right side
    122,711.40x = 12,254,893,010.64
  5. Step 5: Solve for x
    x = 12,254,893,010.64/122,711.40
  6. Step 6: Final answer
    x = 99,867.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.