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Finding the Fourth Proportional to 72,605.10, 108,907.65 and 43,007.70

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Solution

The fourth proportional to 72,605.10, 108,907.65 and 43,007.70 is: 64,511.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,605.10 : 108,907.65 = 43,007.70 : x
  2. Step 2: Convert to fraction form
    72,605.10/108,907.65 = 43,007.70/x
  3. Step 3: Cross multiply
    72,605.10x = 108,907.65 × 43,007.70
  4. Step 4: Simplify right side
    72,605.10x = 4,683,867,538.91
  5. Step 5: Solve for x
    x = 4,683,867,538.91/72,605.10
  6. Step 6: Final answer
    x = 64,511.55

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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.