Home / 121,425.40-182,138.10-81,767.80

Finding the Fourth Proportional to 121,425.40, 182,138.10 and 81,767.80

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Solution

The fourth proportional to 121,425.40, 182,138.10 and 81,767.80 is: 122,651.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,425.40 : 182,138.10 = 81,767.80 : x
  2. Step 2: Convert to fraction form
    121,425.40/182,138.10 = 81,767.80/x
  3. Step 3: Cross multiply
    121,425.40x = 182,138.10 × 81,767.80
  4. Step 4: Simplify right side
    121,425.40x = 14,893,031,733.18
  5. Step 5: Solve for x
    x = 14,893,031,733.18/121,425.40
  6. Step 6: Final answer
    x = 122,651.70

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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.