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Finding the Fourth Proportional to 84,680.40, 127,020.60 and 53,187.60

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Solution

The fourth proportional to 84,680.40, 127,020.60 and 53,187.60 is: 79,781.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,680.40 : 127,020.60 = 53,187.60 : x
  2. Step 2: Convert to fraction form
    84,680.40/127,020.60 = 53,187.60/x
  3. Step 3: Cross multiply
    84,680.40x = 127,020.60 × 53,187.60
  4. Step 4: Simplify right side
    84,680.40x = 6,755,920,864.56
  5. Step 5: Solve for x
    x = 6,755,920,864.56/84,680.40
  6. Step 6: Final answer
    x = 79,781.40

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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.