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Finding the Fourth Proportional to 127,967.10, 191,950.65 and 85,976.70

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Solution

The fourth proportional to 127,967.10, 191,950.65 and 85,976.70 is: 128,965.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,967.10 : 191,950.65 = 85,976.70 : x
  2. Step 2: Convert to fraction form
    127,967.10/191,950.65 = 85,976.70/x
  3. Step 3: Cross multiply
    127,967.10x = 191,950.65 × 85,976.70
  4. Step 4: Simplify right side
    127,967.10x = 16,503,283,449.86
  5. Step 5: Solve for x
    x = 16,503,283,449.86/127,967.10
  6. Step 6: Final answer
    x = 128,965.05

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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.