Home / 77,981.70-116,972.55-38,530.65

Finding the Fourth Proportional to 77,981.70, 116,972.55 and 38,530.65

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Solution

The fourth proportional to 77,981.70, 116,972.55 and 38,530.65 is: 57,795.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,981.70 : 116,972.55 = 38,530.65 : x
  2. Step 2: Convert to fraction form
    77,981.70/116,972.55 = 38,530.65/x
  3. Step 3: Cross multiply
    77,981.70x = 116,972.55 × 38,530.65
  4. Step 4: Simplify right side
    77,981.70x = 4,507,028,383.66
  5. Step 5: Solve for x
    x = 4,507,028,383.66/77,981.70
  6. Step 6: Final answer
    x = 57,795.98

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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.