Home / 138,652.32-191,331.60-78,232.48

Finding the Fourth Proportional to 138,652.32, 191,331.60 and 78,232.48

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Solution

The fourth proportional to 138,652.32, 191,331.60 and 78,232.48 is: 107,955.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,652.32 : 191,331.60 = 78,232.48 : x
  2. Step 2: Convert to fraction form
    138,652.32/191,331.60 = 78,232.48/x
  3. Step 3: Cross multiply
    138,652.32x = 191,331.60 × 78,232.48
  4. Step 4: Simplify right side
    138,652.32x = 14,968,345,570.37
  5. Step 5: Solve for x
    x = 14,968,345,570.37/138,652.32
  6. Step 6: Final answer
    x = 107,955.97

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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.