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Finding the Fourth Proportional to 72,879.20, 109,318.80 and 46,613.60

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Solution

The fourth proportional to 72,879.20, 109,318.80 and 46,613.60 is: 69,920.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,879.20 : 109,318.80 = 46,613.60 : x
  2. Step 2: Convert to fraction form
    72,879.20/109,318.80 = 46,613.60/x
  3. Step 3: Cross multiply
    72,879.20x = 109,318.80 × 46,613.60
  4. Step 4: Simplify right side
    72,879.20x = 5,095,742,815.68
  5. Step 5: Solve for x
    x = 5,095,742,815.68/72,879.20
  6. Step 6: Final answer
    x = 69,920.40

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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.