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Finding the Fourth Proportional to 81,010.60, 111,749.70 and 47,470.12

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Solution

The fourth proportional to 81,010.60, 111,749.70 and 47,470.12 is: 65,482.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,010.60 : 111,749.70 = 47,470.12 : x
  2. Step 2: Convert to fraction form
    81,010.60/111,749.70 = 47,470.12/x
  3. Step 3: Cross multiply
    81,010.60x = 111,749.70 × 47,470.12
  4. Step 4: Simplify right side
    81,010.60x = 5,304,771,668.96
  5. Step 5: Solve for x
    x = 5,304,771,668.96/81,010.60
  6. Step 6: Final answer
    x = 65,482.44

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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.