Home / 81,431.62-112,378.86-45,621.92

Finding the Fourth Proportional to 81,431.62, 112,378.86 and 45,621.92

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Solution

The fourth proportional to 81,431.62, 112,378.86 and 45,621.92 is: 62,960.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,431.62 : 112,378.86 = 45,621.92 : x
  2. Step 2: Convert to fraction form
    81,431.62/112,378.86 = 45,621.92/x
  3. Step 3: Cross multiply
    81,431.62x = 112,378.86 × 45,621.92
  4. Step 4: Simplify right side
    81,431.62x = 5,126,939,360.61
  5. Step 5: Solve for x
    x = 5,126,939,360.61/81,431.62
  6. Step 6: Final answer
    x = 62,960.06

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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.