Home / 100,031.04-138,055.40-65,604.69

Finding the Fourth Proportional to 100,031.04, 138,055.40 and 65,604.69

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Solution

The fourth proportional to 100,031.04, 138,055.40 and 65,604.69 is: 90,542.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,031.04 : 138,055.40 = 65,604.69 : x
  2. Step 2: Convert to fraction form
    100,031.04/138,055.40 = 65,604.69/x
  3. Step 3: Cross multiply
    100,031.04x = 138,055.40 × 65,604.69
  4. Step 4: Simplify right side
    100,031.04x = 9,057,081,391.80
  5. Step 5: Solve for x
    x = 9,057,081,391.80/100,031.04
  6. Step 6: Final answer
    x = 90,542.71

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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.