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Finding the Fourth Proportional to 79,011.45, 109,047.87 and 45,019.80

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Solution

The fourth proportional to 79,011.45, 109,047.87 and 45,019.80 is: 62,134.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,011.45 : 109,047.87 = 45,019.80 : x
  2. Step 2: Convert to fraction form
    79,011.45/109,047.87 = 45,019.80/x
  3. Step 3: Cross multiply
    79,011.45x = 109,047.87 × 45,019.80
  4. Step 4: Simplify right side
    79,011.45x = 4,909,313,297.83
  5. Step 5: Solve for x
    x = 4,909,313,297.83/79,011.45
  6. Step 6: Final answer
    x = 62,134.20

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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.