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Finding the Fourth Proportional to 48,570.84, 72,866.21 and 20,490.90

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Solution

The fourth proportional to 48,570.84, 72,866.21 and 20,490.90 is: 30,740.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,570.84 : 72,866.21 = 20,490.90 : x
  2. Step 2: Convert to fraction form
    48,570.84/72,866.21 = 20,490.90/x
  3. Step 3: Cross multiply
    48,570.84x = 72,866.21 × 20,490.90
  4. Step 4: Simplify right side
    48,570.84x = 1,493,094,109.35
  5. Step 5: Solve for x
    x = 1,493,094,109.35/48,570.84
  6. Step 6: Final answer
    x = 30,740.55

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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.