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Finding the Fourth Proportional to 73,020.40, 109,449.60 and 28,632.40

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Solution

The fourth proportional to 73,020.40, 109,449.60 and 28,632.40 is: 42,916.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,020.40 : 109,449.60 = 28,632.40 : x
  2. Step 2: Convert to fraction form
    73,020.40/109,449.60 = 28,632.40/x
  3. Step 3: Cross multiply
    73,020.40x = 109,449.60 × 28,632.40
  4. Step 4: Simplify right side
    73,020.40x = 3,133,804,727.04
  5. Step 5: Solve for x
    x = 3,133,804,727.04/73,020.40
  6. Step 6: Final answer
    x = 42,916.84

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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.