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Finding the Fourth Proportional to 73,005.55, 109,509.20 and 28,653.19

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Solution

The fourth proportional to 73,005.55, 109,509.20 and 28,653.19 is: 42,980.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,005.55 : 109,509.20 = 28,653.19 : x
  2. Step 2: Convert to fraction form
    73,005.55/109,509.20 = 28,653.19/x
  3. Step 3: Cross multiply
    73,005.55x = 109,509.20 × 28,653.19
  4. Step 4: Simplify right side
    73,005.55x = 3,137,787,223.54
  5. Step 5: Solve for x
    x = 3,137,787,223.54/73,005.55
  6. Step 6: Final answer
    x = 42,980.12

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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.