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Finding the Fourth Proportional to 210,987.80, 316,262.99 and 131,920.46

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Solution

The fourth proportional to 210,987.80, 316,262.99 and 131,920.46 is: 197,743.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,987.80 : 316,262.99 = 131,920.46 : x
  2. Step 2: Convert to fraction form
    210,987.80/316,262.99 = 131,920.46/x
  3. Step 3: Cross multiply
    210,987.80x = 316,262.99 × 131,920.46
  4. Step 4: Simplify right side
    210,987.80x = 41,721,559,121.78
  5. Step 5: Solve for x
    x = 41,721,559,121.78/210,987.80
  6. Step 6: Final answer
    x = 197,743.94

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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.