Home / 139,920.70-193,095.78-79,501.57

Finding the Fourth Proportional to 139,920.70, 193,095.78 and 79,501.57

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Solution

The fourth proportional to 139,920.70, 193,095.78 and 79,501.57 is: 109,715.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,920.70 : 193,095.78 = 79,501.57 : x
  2. Step 2: Convert to fraction form
    139,920.70/193,095.78 = 79,501.57/x
  3. Step 3: Cross multiply
    139,920.70x = 193,095.78 × 79,501.57
  4. Step 4: Simplify right side
    139,920.70x = 15,351,417,272.87
  5. Step 5: Solve for x
    x = 15,351,417,272.87/139,920.70
  6. Step 6: Final answer
    x = 109,715.13

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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.