Home / 138,588.18-191,250.75-78,159.34

Finding the Fourth Proportional to 138,588.18, 191,250.75 and 78,159.34

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Solution

The fourth proportional to 138,588.18, 191,250.75 and 78,159.34 is: 107,859.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,588.18 : 191,250.75 = 78,159.34 : x
  2. Step 2: Convert to fraction form
    138,588.18/191,250.75 = 78,159.34/x
  3. Step 3: Cross multiply
    138,588.18x = 191,250.75 × 78,159.34
  4. Step 4: Simplify right side
    138,588.18x = 14,948,032,926.67
  5. Step 5: Solve for x
    x = 14,948,032,926.67/138,588.18
  6. Step 6: Final answer
    x = 107,859.37

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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.