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Finding the Fourth Proportional to 143,887.60, 215,831.40 and 80,642.80

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Solution

The fourth proportional to 143,887.60, 215,831.40 and 80,642.80 is: 120,964.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,887.60 : 215,831.40 = 80,642.80 : x
  2. Step 2: Convert to fraction form
    143,887.60/215,831.40 = 80,642.80/x
  3. Step 3: Cross multiply
    143,887.60x = 215,831.40 × 80,642.80
  4. Step 4: Simplify right side
    143,887.60x = 17,405,248,423.92
  5. Step 5: Solve for x
    x = 17,405,248,423.92/143,887.60
  6. Step 6: Final answer
    x = 120,964.20

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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.