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Finding the Fourth Proportional to 87,920.64, 131,881.11 and 21,360.81

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Solution

The fourth proportional to 87,920.64, 131,881.11 and 21,360.81 is: 32,041.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,920.64 : 131,881.11 = 21,360.81 : x
  2. Step 2: Convert to fraction form
    87,920.64/131,881.11 = 21,360.81/x
  3. Step 3: Cross multiply
    87,920.64x = 131,881.11 × 21,360.81
  4. Step 4: Simplify right side
    87,920.64x = 2,817,087,226.50
  5. Step 5: Solve for x
    x = 2,817,087,226.50/87,920.64
  6. Step 6: Final answer
    x = 32,041.25

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.