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Finding the Fourth Proportional to 82,937.40, 124,406.10 and 20,607.90

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Solution

The fourth proportional to 82,937.40, 124,406.10 and 20,607.90 is: 30,911.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,937.40 : 124,406.10 = 20,607.90 : x
  2. Step 2: Convert to fraction form
    82,937.40/124,406.10 = 20,607.90/x
  3. Step 3: Cross multiply
    82,937.40x = 124,406.10 × 20,607.90
  4. Step 4: Simplify right side
    82,937.40x = 2,563,748,468.19
  5. Step 5: Solve for x
    x = 2,563,748,468.19/82,937.40
  6. Step 6: Final answer
    x = 30,911.85

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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.