Home / 137,090.74-205,636.10-77,123.20

Finding the Fourth Proportional to 137,090.74, 205,636.10 and 77,123.20

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Solution

The fourth proportional to 137,090.74, 205,636.10 and 77,123.20 is: 115,684.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,090.74 : 205,636.10 = 77,123.20 : x
  2. Step 2: Convert to fraction form
    137,090.74/205,636.10 = 77,123.20/x
  3. Step 3: Cross multiply
    137,090.74x = 205,636.10 × 77,123.20
  4. Step 4: Simplify right side
    137,090.74x = 15,859,314,067.52
  5. Step 5: Solve for x
    x = 15,859,314,067.52/137,090.74
  6. Step 6: Final answer
    x = 115,684.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.