Home / 72,005.08-99,372-40,180.20

Finding the Fourth Proportional to 72,005.08, 99,372 and 40,180.20

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Solution

The fourth proportional to 72,005.08, 99,372 and 40,180.20 is: 55,451.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,005.08 : 99,372 = 40,180.20 : x
  2. Step 2: Convert to fraction form
    72,005.08/99,372 = 40,180.20/x
  3. Step 3: Cross multiply
    72,005.08x = 99,372 × 40,180.20
  4. Step 4: Simplify right side
    72,005.08x = 3,992,786,834.40
  5. Step 5: Solve for x
    x = 3,992,786,834.40/72,005.08
  6. Step 6: Final answer
    x = 55,451.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.