Home / 90,239.32-134,713.13-78,432.76

Finding the Fourth Proportional to 90,239.32, 134,713.13 and 78,432.76

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Solution

The fourth proportional to 90,239.32, 134,713.13 and 78,432.76 is: 117,087.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,239.32 : 134,713.13 = 78,432.76 : x
  2. Step 2: Convert to fraction form
    90,239.32/134,713.13 = 78,432.76/x
  3. Step 3: Cross multiply
    90,239.32x = 134,713.13 × 78,432.76
  4. Step 4: Simplify right side
    90,239.32x = 10,565,922,594.14
  5. Step 5: Solve for x
    x = 10,565,922,594.14/90,239.32
  6. Step 6: Final answer
    x = 117,087.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.