Home / 142,495.27-196,642.65-78,831.70

Finding the Fourth Proportional to 142,495.27, 196,642.65 and 78,831.70

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Solution

The fourth proportional to 142,495.27, 196,642.65 and 78,831.70 is: 108,787.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,495.27 : 196,642.65 = 78,831.70 : x
  2. Step 2: Convert to fraction form
    142,495.27/196,642.65 = 78,831.70/x
  3. Step 3: Cross multiply
    142,495.27x = 196,642.65 × 78,831.70
  4. Step 4: Simplify right side
    142,495.27x = 15,501,674,392.01
  5. Step 5: Solve for x
    x = 15,501,674,392.01/142,495.27
  6. Step 6: Final answer
    x = 108,787.29

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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.