Home / 80,953.40-121,430.10-45,378.20

Finding the Fourth Proportional to 80,953.40, 121,430.10 and 45,378.20

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Solution

The fourth proportional to 80,953.40, 121,430.10 and 45,378.20 is: 68,067.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,953.40 : 121,430.10 = 45,378.20 : x
  2. Step 2: Convert to fraction form
    80,953.40/121,430.10 = 45,378.20/x
  3. Step 3: Cross multiply
    80,953.40x = 121,430.10 × 45,378.20
  4. Step 4: Simplify right side
    80,953.40x = 5,510,279,363.82
  5. Step 5: Solve for x
    x = 5,510,279,363.82/80,953.40
  6. Step 6: Final answer
    x = 68,067.30

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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.