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Finding the Fourth Proportional to 83,579.90, 115,312.21 and 47,744.54

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Solution

The fourth proportional to 83,579.90, 115,312.21 and 47,744.54 is: 65,871.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,579.90 : 115,312.21 = 47,744.54 : x
  2. Step 2: Convert to fraction form
    83,579.90/115,312.21 = 47,744.54/x
  3. Step 3: Cross multiply
    83,579.90x = 115,312.21 × 47,744.54
  4. Step 4: Simplify right side
    83,579.90x = 5,505,528,422.83
  5. Step 5: Solve for x
    x = 5,505,528,422.83/83,579.90
  6. Step 6: Final answer
    x = 65,871.44

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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.