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Finding the Fourth Proportional to 72,004.80, 107,920.80 and 36,926.40

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Solution

The fourth proportional to 72,004.80, 107,920.80 and 36,926.40 is: 55,345.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,004.80 : 107,920.80 = 36,926.40 : x
  2. Step 2: Convert to fraction form
    72,004.80/107,920.80 = 36,926.40/x
  3. Step 3: Cross multiply
    72,004.80x = 107,920.80 × 36,926.40
  4. Step 4: Simplify right side
    72,004.80x = 3,985,126,629.12
  5. Step 5: Solve for x
    x = 3,985,126,629.12/72,004.80
  6. Step 6: Final answer
    x = 55,345.29

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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.