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Finding the Fourth Proportional to 82,904.40, 124,356.60 and 20,574.90

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Solution

The fourth proportional to 82,904.40, 124,356.60 and 20,574.90 is: 30,862.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,904.40 : 124,356.60 = 20,574.90 : x
  2. Step 2: Convert to fraction form
    82,904.40/124,356.60 = 20,574.90/x
  3. Step 3: Cross multiply
    82,904.40x = 124,356.60 × 20,574.90
  4. Step 4: Simplify right side
    82,904.40x = 2,558,624,609.34
  5. Step 5: Solve for x
    x = 2,558,624,609.34/82,904.40
  6. Step 6: Final answer
    x = 30,862.35

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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.