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Finding the Fourth Proportional to 91,979.87, 127,028.59 and 63,373.91

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Solution

The fourth proportional to 91,979.87, 127,028.59 and 63,373.91 is: 87,522.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,979.87 : 127,028.59 = 63,373.91 : x
  2. Step 2: Convert to fraction form
    91,979.87/127,028.59 = 63,373.91/x
  3. Step 3: Cross multiply
    91,979.87x = 127,028.59 × 63,373.91
  4. Step 4: Simplify right side
    91,979.87x = 8,050,297,636.51
  5. Step 5: Solve for x
    x = 8,050,297,636.51/91,979.87
  6. Step 6: Final answer
    x = 87,522.39

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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.