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Finding the Fourth Proportional to 81,358.99, 112,262.04 and 51,122.90

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Solution

The fourth proportional to 81,358.99, 112,262.04 and 51,122.90 is: 70,541.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,358.99 : 112,262.04 = 51,122.90 : x
  2. Step 2: Convert to fraction form
    81,358.99/112,262.04 = 51,122.90/x
  3. Step 3: Cross multiply
    81,358.99x = 112,262.04 × 51,122.90
  4. Step 4: Simplify right side
    81,358.99x = 5,739,161,044.72
  5. Step 5: Solve for x
    x = 5,739,161,044.72/81,358.99
  6. Step 6: Final answer
    x = 70,541.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.