Home / 258,561.90-387,842.76-81,082.53

Finding the Fourth Proportional to 258,561.90, 387,842.76 and 81,082.53

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Solution

The fourth proportional to 258,561.90, 387,842.76 and 81,082.53 is: 121,623.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,561.90 : 387,842.76 = 81,082.53 : x
  2. Step 2: Convert to fraction form
    258,561.90/387,842.76 = 81,082.53/x
  3. Step 3: Cross multiply
    258,561.90x = 387,842.76 × 81,082.53
  4. Step 4: Simplify right side
    258,561.90x = 31,447,272,222.98
  5. Step 5: Solve for x
    x = 31,447,272,222.98/258,561.90
  6. Step 6: Final answer
    x = 121,623.77

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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.