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Finding the Fourth Proportional to 59,940.20, 89,910.30 and 20,491.40

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Solution

The fourth proportional to 59,940.20, 89,910.30 and 20,491.40 is: 30,737.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,940.20 : 89,910.30 = 20,491.40 : x
  2. Step 2: Convert to fraction form
    59,940.20/89,910.30 = 20,491.40/x
  3. Step 3: Cross multiply
    59,940.20x = 89,910.30 × 20,491.40
  4. Step 4: Simplify right side
    59,940.20x = 1,842,387,921.42
  5. Step 5: Solve for x
    x = 1,842,387,921.42/59,940.20
  6. Step 6: Final answer
    x = 30,737.10

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1.5x scale

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.