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Finding the Fourth Proportional to 79,955.36, 119,911.14 and 30,031.60

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Solution

The fourth proportional to 79,955.36, 119,911.14 and 30,031.60 is: 45,039.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,955.36 : 119,911.14 = 30,031.60 : x
  2. Step 2: Convert to fraction form
    79,955.36/119,911.14 = 30,031.60/x
  3. Step 3: Cross multiply
    79,955.36x = 119,911.14 × 30,031.60
  4. Step 4: Simplify right side
    79,955.36x = 3,601,123,392.02
  5. Step 5: Solve for x
    x = 3,601,123,392.02/79,955.36
  6. Step 6: Final answer
    x = 45,039.17

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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.