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Finding the Fourth Proportional to 72,448.20, 108,666.90 and 30,317.40

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Solution

The fourth proportional to 72,448.20, 108,666.90 and 30,317.40 is: 45,473.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,448.20 : 108,666.90 = 30,317.40 : x
  2. Step 2: Convert to fraction form
    72,448.20/108,666.90 = 30,317.40/x
  3. Step 3: Cross multiply
    72,448.20x = 108,666.90 × 30,317.40
  4. Step 4: Simplify right side
    72,448.20x = 3,294,497,874.06
  5. Step 5: Solve for x
    x = 3,294,497,874.06/72,448.20
  6. Step 6: Final answer
    x = 45,473.84

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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.