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Finding the Fourth Proportional to 83,620.55, 115,402.05 and 47,322.02

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Solution

The fourth proportional to 83,620.55, 115,402.05 and 47,322.02 is: 65,307.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,620.55 : 115,402.05 = 47,322.02 : x
  2. Step 2: Convert to fraction form
    83,620.55/115,402.05 = 47,322.02/x
  3. Step 3: Cross multiply
    83,620.55x = 115,402.05 × 47,322.02
  4. Step 4: Simplify right side
    83,620.55x = 5,461,058,406.65
  5. Step 5: Solve for x
    x = 5,461,058,406.65/83,620.55
  6. Step 6: Final answer
    x = 65,307.61

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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.