Home / 78,081.39-107,678.57-51,247.17

Finding the Fourth Proportional to 78,081.39, 107,678.57 and 51,247.17

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Solution

The fourth proportional to 78,081.39, 107,678.57 and 51,247.17 is: 70,672.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,081.39 : 107,678.57 = 51,247.17 : x
  2. Step 2: Convert to fraction form
    78,081.39/107,678.57 = 51,247.17/x
  3. Step 3: Cross multiply
    78,081.39x = 107,678.57 × 51,247.17
  4. Step 4: Simplify right side
    78,081.39x = 5,518,221,725.91
  5. Step 5: Solve for x
    x = 5,518,221,725.91/78,081.39
  6. Step 6: Final answer
    x = 70,672.69

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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.