Home / 78,229.04-107,927.78-51,386

Finding the Fourth Proportional to 78,229.04, 107,927.78 and 51,386

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Solution

The fourth proportional to 78,229.04, 107,927.78 and 51,386 is: 70,894.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,229.04 : 107,927.78 = 51,386 : x
  2. Step 2: Convert to fraction form
    78,229.04/107,927.78 = 51,386/x
  3. Step 3: Cross multiply
    78,229.04x = 107,927.78 × 51,386
  4. Step 4: Simplify right side
    78,229.04x = 5,545,976,903.08
  5. Step 5: Solve for x
    x = 5,545,976,903.08/78,229.04
  6. Step 6: Final answer
    x = 70,894.09

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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.