Home / 72,142.12-99,555.78-40,309.48

Finding the Fourth Proportional to 72,142.12, 99,555.78 and 40,309.48

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Solution

The fourth proportional to 72,142.12, 99,555.78 and 40,309.48 is: 55,626.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,142.12 : 99,555.78 = 40,309.48 : x
  2. Step 2: Convert to fraction form
    72,142.12/99,555.78 = 40,309.48/x
  3. Step 3: Cross multiply
    72,142.12x = 99,555.78 × 40,309.48
  4. Step 4: Simplify right side
    72,142.12x = 4,013,041,722.79
  5. Step 5: Solve for x
    x = 4,013,041,722.79/72,142.12
  6. Step 6: Final answer
    x = 55,626.89

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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.