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Finding the Fourth Proportional to 215,132.70, 322,588.88 and 126,412.86

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Solution

The fourth proportional to 215,132.70, 322,588.88 and 126,412.86 is: 189,554.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,132.70 : 322,588.88 = 126,412.86 : x
  2. Step 2: Convert to fraction form
    215,132.70/322,588.88 = 126,412.86/x
  3. Step 3: Cross multiply
    215,132.70x = 322,588.88 × 126,412.86
  4. Step 4: Simplify right side
    215,132.70x = 40,779,382,925.00
  5. Step 5: Solve for x
    x = 40,779,382,925.00/215,132.70
  6. Step 6: Final answer
    x = 189,554.55

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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.