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Finding the Fourth Proportional to 89,991.90, 124,188.07 and 49,156.05

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Solution

The fourth proportional to 89,991.90, 124,188.07 and 49,156.05 is: 67,834.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,991.90 : 124,188.07 = 49,156.05 : x
  2. Step 2: Convert to fraction form
    89,991.90/124,188.07 = 49,156.05/x
  3. Step 3: Cross multiply
    89,991.90x = 124,188.07 × 49,156.05
  4. Step 4: Simplify right side
    89,991.90x = 6,104,594,978.32
  5. Step 5: Solve for x
    x = 6,104,594,978.32/89,991.90
  6. Step 6: Final answer
    x = 67,834.94

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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.