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Finding the Fourth Proportional to 58,781.93, 81,131.97 and 38,640.67

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Solution

The fourth proportional to 58,781.93, 81,131.97 and 38,640.67 is: 53,332.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,781.93 : 81,131.97 = 38,640.67 : x
  2. Step 2: Convert to fraction form
    58,781.93/81,131.97 = 38,640.67/x
  3. Step 3: Cross multiply
    58,781.93x = 81,131.97 × 38,640.67
  4. Step 4: Simplify right side
    58,781.93x = 3,134,993,621.29
  5. Step 5: Solve for x
    x = 3,134,993,621.29/58,781.93
  6. Step 6: Final answer
    x = 53,332.61

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1.5x scale

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.