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Finding the Fourth Proportional to 218,412.65, 301,325.70 and 135,587.78

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Solution

The fourth proportional to 218,412.65, 301,325.70 and 135,587.78 is: 187,059.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,412.65 : 301,325.70 = 135,587.78 : x
  2. Step 2: Convert to fraction form
    218,412.65/301,325.70 = 135,587.78/x
  3. Step 3: Cross multiply
    218,412.65x = 301,325.70 × 135,587.78
  4. Step 4: Simplify right side
    218,412.65x = 40,856,081,288.69
  5. Step 5: Solve for x
    x = 40,856,081,288.69/218,412.65
  6. Step 6: Final answer
    x = 187,059.14

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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.