Home / 138,514.41-191,131.47-78,087.60

Finding the Fourth Proportional to 138,514.41, 191,131.47 and 78,087.60

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Solution

The fourth proportional to 138,514.41, 191,131.47 and 78,087.60 is: 107,750.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,514.41 : 191,131.47 = 78,087.60 : x
  2. Step 2: Convert to fraction form
    138,514.41/191,131.47 = 78,087.60/x
  3. Step 3: Cross multiply
    138,514.41x = 191,131.47 × 78,087.60
  4. Step 4: Simplify right side
    138,514.41x = 14,924,997,776.77
  5. Step 5: Solve for x
    x = 14,924,997,776.77/138,514.41
  6. Step 6: Final answer
    x = 107,750.51

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1.5x scale

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.