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Finding the Fourth Proportional to 78,392.59, 108,226.66 and 51,612.94

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Solution

The fourth proportional to 78,392.59, 108,226.66 and 51,612.94 is: 71,255.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,392.59 : 108,226.66 = 51,612.94 : x
  2. Step 2: Convert to fraction form
    78,392.59/108,226.66 = 51,612.94/x
  3. Step 3: Cross multiply
    78,392.59x = 108,226.66 × 51,612.94
  4. Step 4: Simplify right side
    78,392.59x = 5,585,895,709.38
  5. Step 5: Solve for x
    x = 5,585,895,709.38/78,392.59
  6. Step 6: Final answer
    x = 71,255.41

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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.