Home / 72,018.07-99,385.04-40,187.07

Finding the Fourth Proportional to 72,018.07, 99,385.04 and 40,187.07

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Solution

The fourth proportional to 72,018.07, 99,385.04 and 40,187.07 is: 55,458.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,018.07 : 99,385.04 = 40,187.07 : x
  2. Step 2: Convert to fraction form
    72,018.07/99,385.04 = 40,187.07/x
  3. Step 3: Cross multiply
    72,018.07x = 99,385.04 × 40,187.07
  4. Step 4: Simplify right side
    72,018.07x = 3,993,993,659.90
  5. Step 5: Solve for x
    x = 3,993,993,659.90/72,018.07
  6. Step 6: Final answer
    x = 55,458.22

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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.