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Finding the Fourth Proportional to 104,839.80, 157,086.90 and 87,214.20

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Solution

The fourth proportional to 104,839.80, 157,086.90 and 87,214.20 is: 130,677.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,839.80 : 157,086.90 = 87,214.20 : x
  2. Step 2: Convert to fraction form
    104,839.80/157,086.90 = 87,214.20/x
  3. Step 3: Cross multiply
    104,839.80x = 157,086.90 × 87,214.20
  4. Step 4: Simplify right side
    104,839.80x = 13,700,208,313.98
  5. Step 5: Solve for x
    x = 13,700,208,313.98/104,839.80
  6. Step 6: Final answer
    x = 130,677.55

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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.