Home / 172,138.19-257,728.41-87,716.35

Finding the Fourth Proportional to 172,138.19, 257,728.41 and 87,716.35

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Solution

The fourth proportional to 172,138.19, 257,728.41 and 87,716.35 is: 131,330.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,138.19 : 257,728.41 = 87,716.35 : x
  2. Step 2: Convert to fraction form
    172,138.19/257,728.41 = 87,716.35/x
  3. Step 3: Cross multiply
    172,138.19x = 257,728.41 × 87,716.35
  4. Step 4: Simplify right side
    172,138.19x = 22,606,995,416.50
  5. Step 5: Solve for x
    x = 22,606,995,416.50/172,138.19
  6. Step 6: Final answer
    x = 131,330.50

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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.