Home / 138,501.48-191,132.88-87,536.79

Finding the Fourth Proportional to 138,501.48, 191,132.88 and 87,536.79

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Solution

The fourth proportional to 138,501.48, 191,132.88 and 87,536.79 is: 120,801.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,501.48 : 191,132.88 = 87,536.79 : x
  2. Step 2: Convert to fraction form
    138,501.48/191,132.88 = 87,536.79/x
  3. Step 3: Cross multiply
    138,501.48x = 191,132.88 × 87,536.79
  4. Step 4: Simplify right side
    138,501.48x = 16,731,158,778.66
  5. Step 5: Solve for x
    x = 16,731,158,778.66/138,501.48
  6. Step 6: Final answer
    x = 120,801.30

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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.