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Finding the Fourth Proportional to 48,285.40, 72,428.10 and 36,621.40

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Solution

The fourth proportional to 48,285.40, 72,428.10 and 36,621.40 is: 54,932.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,285.40 : 72,428.10 = 36,621.40 : x
  2. Step 2: Convert to fraction form
    48,285.40/72,428.10 = 36,621.40/x
  3. Step 3: Cross multiply
    48,285.40x = 72,428.10 × 36,621.40
  4. Step 4: Simplify right side
    48,285.40x = 2,652,418,421.34
  5. Step 5: Solve for x
    x = 2,652,418,421.34/48,285.40
  6. Step 6: Final answer
    x = 54,932.10

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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.