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Finding the Fourth Proportional to 59,939.20, 89,908.80 and 20,490.40

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Solution

The fourth proportional to 59,939.20, 89,908.80 and 20,490.40 is: 30,735.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,939.20 : 89,908.80 = 20,490.40 : x
  2. Step 2: Convert to fraction form
    59,939.20/89,908.80 = 20,490.40/x
  3. Step 3: Cross multiply
    59,939.20x = 89,908.80 × 20,490.40
  4. Step 4: Simplify right side
    59,939.20x = 1,842,267,275.52
  5. Step 5: Solve for x
    x = 1,842,267,275.52/59,939.20
  6. Step 6: Final answer
    x = 30,735.60

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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.