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Finding the Fourth Proportional to 84,021.55, 115,957.91 and 62,763.91

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Solution

The fourth proportional to 84,021.55, 115,957.91 and 62,763.91 is: 86,620.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,021.55 : 115,957.91 = 62,763.91 : x
  2. Step 2: Convert to fraction form
    84,021.55/115,957.91 = 62,763.91/x
  3. Step 3: Cross multiply
    84,021.55x = 115,957.91 × 62,763.91
  4. Step 4: Simplify right side
    84,021.55x = 7,277,971,827.03
  5. Step 5: Solve for x
    x = 7,277,971,827.03/84,021.55
  6. Step 6: Final answer
    x = 86,620.30

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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.