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Finding the Fourth Proportional to 141,988.97, 195,945.44 and 78,326.76

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Solution

The fourth proportional to 141,988.97, 195,945.44 and 78,326.76 is: 108,091.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,988.97 : 195,945.44 = 78,326.76 : x
  2. Step 2: Convert to fraction form
    141,988.97/195,945.44 = 78,326.76/x
  3. Step 3: Cross multiply
    141,988.97x = 195,945.44 × 78,326.76
  4. Step 4: Simplify right side
    141,988.97x = 15,347,771,647.79
  5. Step 5: Solve for x
    x = 15,347,771,647.79/141,988.97
  6. Step 6: Final answer
    x = 108,091.30

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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.