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Finding the Fourth Proportional to 84,148.80, 116,042.40 and 65,279.04

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Solution

The fourth proportional to 84,148.80, 116,042.40 and 65,279.04 is: 90,020.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,148.80 : 116,042.40 = 65,279.04 : x
  2. Step 2: Convert to fraction form
    84,148.80/116,042.40 = 65,279.04/x
  3. Step 3: Cross multiply
    84,148.80x = 116,042.40 × 65,279.04
  4. Step 4: Simplify right side
    84,148.80x = 7,575,136,471.30
  5. Step 5: Solve for x
    x = 7,575,136,471.30/84,148.80
  6. Step 6: Final answer
    x = 90,020.73

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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.