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Finding the Fourth Proportional to 82,930.80, 124,259.40 and 47,809.20

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Solution

The fourth proportional to 82,930.80, 124,259.40 and 47,809.20 is: 71,634.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,930.80 : 124,259.40 = 47,809.20 : x
  2. Step 2: Convert to fraction form
    82,930.80/124,259.40 = 47,809.20/x
  3. Step 3: Cross multiply
    82,930.80x = 124,259.40 × 47,809.20
  4. Step 4: Simplify right side
    82,930.80x = 5,940,742,506.48
  5. Step 5: Solve for x
    x = 5,940,742,506.48/82,930.80
  6. Step 6: Final answer
    x = 71,634.94

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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.