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Finding the Fourth Proportional to 58,143.40, 87,215.43 and 20,704.93

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Solution

The fourth proportional to 58,143.40, 87,215.43 and 20,704.93 is: 31,057.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,143.40 : 87,215.43 = 20,704.93 : x
  2. Step 2: Convert to fraction form
    58,143.40/87,215.43 = 20,704.93/x
  3. Step 3: Cross multiply
    58,143.40x = 87,215.43 × 20,704.93
  4. Step 4: Simplify right side
    58,143.40x = 1,805,789,232.67
  5. Step 5: Solve for x
    x = 1,805,789,232.67/58,143.40
  6. Step 6: Final answer
    x = 31,057.51

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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.