Home / 138,640.44-191,323.62-78,211.02

Finding the Fourth Proportional to 138,640.44, 191,323.62 and 78,211.02

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Solution

The fourth proportional to 138,640.44, 191,323.62 and 78,211.02 is: 107,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,640.44 : 191,323.62 = 78,211.02 : x
  2. Step 2: Convert to fraction form
    138,640.44/191,323.62 = 78,211.02/x
  3. Step 3: Cross multiply
    138,640.44x = 191,323.62 × 78,211.02
  4. Step 4: Simplify right side
    138,640.44x = 14,963,615,470.29
  5. Step 5: Solve for x
    x = 14,963,615,470.29/138,640.44
  6. Step 6: Final answer
    x = 107,931.10

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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.