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Finding the Fourth Proportional to 86,886.47, 129,790.61 and 63,004.43

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Solution

The fourth proportional to 86,886.47, 129,790.61 and 63,004.43 is: 94,115.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,886.47 : 129,790.61 = 63,004.43 : x
  2. Step 2: Convert to fraction form
    86,886.47/129,790.61 = 63,004.43/x
  3. Step 3: Cross multiply
    86,886.47x = 129,790.61 × 63,004.43
  4. Step 4: Simplify right side
    86,886.47x = 8,177,383,402.40
  5. Step 5: Solve for x
    x = 8,177,383,402.40/86,886.47
  6. Step 6: Final answer
    x = 94,115.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.