Home / 128,860.23-193,212.67-57,770

Finding the Fourth Proportional to 128,860.23, 193,212.67 and 57,770

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Solution

The fourth proportional to 128,860.23, 193,212.67 and 57,770 is: 86,620.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,860.23 : 193,212.67 = 57,770 : x
  2. Step 2: Convert to fraction form
    128,860.23/193,212.67 = 57,770/x
  3. Step 3: Cross multiply
    128,860.23x = 193,212.67 × 57,770
  4. Step 4: Simplify right side
    128,860.23x = 11,161,895,945.90
  5. Step 5: Solve for x
    x = 11,161,895,945.90/128,860.23
  6. Step 6: Final answer
    x = 86,620.18

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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.