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Finding the Fourth Proportional to 259,085.67, 388,741.10 and 90,726.77

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Solution

The fourth proportional to 259,085.67, 388,741.10 and 90,726.77 is: 136,129.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,085.67 : 388,741.10 = 90,726.77 : x
  2. Step 2: Convert to fraction form
    259,085.67/388,741.10 = 90,726.77/x
  3. Step 3: Cross multiply
    259,085.67x = 388,741.10 × 90,726.77
  4. Step 4: Simplify right side
    259,085.67x = 35,269,221,971.91
  5. Step 5: Solve for x
    x = 35,269,221,971.91/259,085.67
  6. Step 6: Final answer
    x = 136,129.57

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1.5x scale

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.