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Finding the Fourth Proportional to 210,862.08, 315,514.08 and 126,673.20

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Solution

The fourth proportional to 210,862.08, 315,514.08 and 126,673.20 is: 189,541.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,862.08 : 315,514.08 = 126,673.20 : x
  2. Step 2: Convert to fraction form
    210,862.08/315,514.08 = 126,673.20/x
  3. Step 3: Cross multiply
    210,862.08x = 315,514.08 × 126,673.20
  4. Step 4: Simplify right side
    210,862.08x = 39,967,178,158.66
  5. Step 5: Solve for x
    x = 39,967,178,158.66/210,862.08
  6. Step 6: Final answer
    x = 189,541.80

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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.