Home / 138,167.72-190,669.40-77,738.44

Finding the Fourth Proportional to 138,167.72, 190,669.40 and 77,738.44

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Solution

The fourth proportional to 138,167.72, 190,669.40 and 77,738.44 is: 107,277.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,167.72 : 190,669.40 = 77,738.44 : x
  2. Step 2: Convert to fraction form
    138,167.72/190,669.40 = 77,738.44/x
  3. Step 3: Cross multiply
    138,167.72x = 190,669.40 × 77,738.44
  4. Step 4: Simplify right side
    138,167.72x = 14,822,341,711.74
  5. Step 5: Solve for x
    x = 14,822,341,711.74/138,167.72
  6. Step 6: Final answer
    x = 107,277.89

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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.