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Finding the Fourth Proportional to 87,894, 131,840.70 and 21,334.08

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Solution

The fourth proportional to 87,894, 131,840.70 and 21,334.08 is: 32,001.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,894 : 131,840.70 = 21,334.08 : x
  2. Step 2: Convert to fraction form
    87,894/131,840.70 = 21,334.08/x
  3. Step 3: Cross multiply
    87,894x = 131,840.70 × 21,334.08
  4. Step 4: Simplify right side
    87,894x = 2,812,700,041.06
  5. Step 5: Solve for x
    x = 2,812,700,041.06/87,894
  6. Step 6: Final answer
    x = 32,001.05

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Why These Related Problems?

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