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Finding the Fourth Proportional to 82,950.63, 124,425.90 and 20,621.13

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Solution

The fourth proportional to 82,950.63, 124,425.90 and 20,621.13 is: 30,931.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,950.63 : 124,425.90 = 20,621.13 : x
  2. Step 2: Convert to fraction form
    82,950.63/124,425.90 = 20,621.13/x
  3. Step 3: Cross multiply
    82,950.63x = 124,425.90 × 20,621.13
  4. Step 4: Simplify right side
    82,950.63x = 2,565,802,192.67
  5. Step 5: Solve for x
    x = 2,565,802,192.67/82,950.63
  6. Step 6: Final answer
    x = 30,931.68

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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.