Home / 139,707.03-192,812.13-78,463.29

Finding the Fourth Proportional to 139,707.03, 192,812.13 and 78,463.29

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Solution

The fourth proportional to 139,707.03, 192,812.13 and 78,463.29 is: 108,288.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,707.03 : 192,812.13 = 78,463.29 : x
  2. Step 2: Convert to fraction form
    139,707.03/192,812.13 = 78,463.29/x
  3. Step 3: Cross multiply
    139,707.03x = 192,812.13 × 78,463.29
  4. Step 4: Simplify right side
    139,707.03x = 15,128,674,071.71
  5. Step 5: Solve for x
    x = 15,128,674,071.71/139,707.03
  6. Step 6: Final answer
    x = 108,288.57

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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.