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Finding the Fourth Proportional to 82,660.80, 124,048.80 and 53,150.40

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Solution

The fourth proportional to 82,660.80, 124,048.80 and 53,150.40 is: 79,762.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,660.80 : 124,048.80 = 53,150.40 : x
  2. Step 2: Convert to fraction form
    82,660.80/124,048.80 = 53,150.40/x
  3. Step 3: Cross multiply
    82,660.80x = 124,048.80 × 53,150.40
  4. Step 4: Simplify right side
    82,660.80x = 6,593,243,339.52
  5. Step 5: Solve for x
    x = 6,593,243,339.52/82,660.80
  6. Step 6: Final answer
    x = 79,762.64

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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.