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Finding the Fourth Proportional to 218,785.65, 327,686.40 and 130,212.15

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Solution

The fourth proportional to 218,785.65, 327,686.40 and 130,212.15 is: 195,025.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,785.65 : 327,686.40 = 130,212.15 : x
  2. Step 2: Convert to fraction form
    218,785.65/327,686.40 = 130,212.15/x
  3. Step 3: Cross multiply
    218,785.65x = 327,686.40 × 130,212.15
  4. Step 4: Simplify right side
    218,785.65x = 42,668,750,669.76
  5. Step 5: Solve for x
    x = 42,668,750,669.76/218,785.65
  6. Step 6: Final answer
    x = 195,025.36

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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.