Home / 90,031.11-135,053.25-30,866.28

Finding the Fourth Proportional to 90,031.11, 135,053.25 and 30,866.28

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Solution

The fourth proportional to 90,031.11, 135,053.25 and 30,866.28 is: 46,301.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,031.11 : 135,053.25 = 30,866.28 : x
  2. Step 2: Convert to fraction form
    90,031.11/135,053.25 = 30,866.28/x
  3. Step 3: Cross multiply
    90,031.11x = 135,053.25 × 30,866.28
  4. Step 4: Simplify right side
    90,031.11x = 4,168,591,429.41
  5. Step 5: Solve for x
    x = 4,168,591,429.41/90,031.11
  6. Step 6: Final answer
    x = 46,301.68

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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.