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Finding the Fourth Proportional to 138,950.58, 191,730.02 and 80,820.19

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Solution

The fourth proportional to 138,950.58, 191,730.02 and 80,820.19 is: 111,519.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,950.58 : 191,730.02 = 80,820.19 : x
  2. Step 2: Convert to fraction form
    138,950.58/191,730.02 = 80,820.19/x
  3. Step 3: Cross multiply
    138,950.58x = 191,730.02 × 80,820.19
  4. Step 4: Simplify right side
    138,950.58x = 15,495,656,480.67
  5. Step 5: Solve for x
    x = 15,495,656,480.67/138,950.58
  6. Step 6: Final answer
    x = 111,519.19

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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.