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Finding the Fourth Proportional to 210,987.39, 316,373.40 and 68,741.19

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Solution

The fourth proportional to 210,987.39, 316,373.40 and 68,741.19 is: 103,076.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,987.39 : 316,373.40 = 68,741.19 : x
  2. Step 2: Convert to fraction form
    210,987.39/316,373.40 = 68,741.19/x
  3. Step 3: Cross multiply
    210,987.39x = 316,373.40 × 68,741.19
  4. Step 4: Simplify right side
    210,987.39x = 21,747,884,000.35
  5. Step 5: Solve for x
    x = 21,747,884,000.35/210,987.39
  6. Step 6: Final answer
    x = 103,076.70

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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.