Home / 149,031.68-205,651.52-87,768.16

Finding the Fourth Proportional to 149,031.68, 205,651.52 and 87,768.16

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Solution

The fourth proportional to 149,031.68, 205,651.52 and 87,768.16 is: 121,112.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,031.68 : 205,651.52 = 87,768.16 : x
  2. Step 2: Convert to fraction form
    149,031.68/205,651.52 = 87,768.16/x
  3. Step 3: Cross multiply
    149,031.68x = 205,651.52 × 87,768.16
  4. Step 4: Simplify right side
    149,031.68x = 18,049,655,511.60
  5. Step 5: Solve for x
    x = 18,049,655,511.60/149,031.68
  6. Step 6: Final answer
    x = 121,112.88

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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.