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Finding the Fourth Proportional to 80,970.61, 111,739.61 and 45,159.70

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Solution

The fourth proportional to 80,970.61, 111,739.61 and 45,159.70 is: 62,320.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,970.61 : 111,739.61 = 45,159.70 : x
  2. Step 2: Convert to fraction form
    80,970.61/111,739.61 = 45,159.70/x
  3. Step 3: Cross multiply
    80,970.61x = 111,739.61 × 45,159.70
  4. Step 4: Simplify right side
    80,970.61x = 5,046,126,481.22
  5. Step 5: Solve for x
    x = 5,046,126,481.22/80,970.61
  6. Step 6: Final answer
    x = 62,320.47

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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.