Home / 100,031.46-138,093.54-77,319.12

Finding the Fourth Proportional to 100,031.46, 138,093.54 and 77,319.12

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Solution

The fourth proportional to 100,031.46, 138,093.54 and 77,319.12 is: 106,739.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,031.46 : 138,093.54 = 77,319.12 : x
  2. Step 2: Convert to fraction form
    100,031.46/138,093.54 = 77,319.12/x
  3. Step 3: Cross multiply
    100,031.46x = 138,093.54 × 77,319.12
  4. Step 4: Simplify right side
    100,031.46x = 10,677,270,990.48
  5. Step 5: Solve for x
    x = 10,677,270,990.48/100,031.46
  6. Step 6: Final answer
    x = 106,739.13

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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.