Home / 138,471.64-191,085.34-78,054.82

Finding the Fourth Proportional to 138,471.64, 191,085.34 and 78,054.82

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Solution

The fourth proportional to 138,471.64, 191,085.34 and 78,054.82 is: 107,712.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,471.64 : 191,085.34 = 78,054.82 : x
  2. Step 2: Convert to fraction form
    138,471.64/191,085.34 = 78,054.82/x
  3. Step 3: Cross multiply
    138,471.64x = 191,085.34 × 78,054.82
  4. Step 4: Simplify right side
    138,471.64x = 14,915,131,818.34
  5. Step 5: Solve for x
    x = 14,915,131,818.34/138,471.64
  6. Step 6: Final answer
    x = 107,712.54

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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.