Home / 77,078.79-115,646.54-55,065.42

Finding the Fourth Proportional to 77,078.79, 115,646.54 and 55,065.42

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Solution

The fourth proportional to 77,078.79, 115,646.54 and 55,065.42 is: 82,618.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,078.79 : 115,646.54 = 55,065.42 : x
  2. Step 2: Convert to fraction form
    77,078.79/115,646.54 = 55,065.42/x
  3. Step 3: Cross multiply
    77,078.79x = 115,646.54 × 55,065.42
  4. Step 4: Simplify right side
    77,078.79x = 6,368,125,021.32
  5. Step 5: Solve for x
    x = 6,368,125,021.32/77,078.79
  6. Step 6: Final answer
    x = 82,618.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.