Home / 72,206.10-99,636.75-39,935.59

Finding the Fourth Proportional to 72,206.10, 99,636.75 and 39,935.59

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Solution

The fourth proportional to 72,206.10, 99,636.75 and 39,935.59 is: 55,106.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,206.10 : 99,636.75 = 39,935.59 : x
  2. Step 2: Convert to fraction form
    72,206.10/99,636.75 = 39,935.59/x
  3. Step 3: Cross multiply
    72,206.10x = 99,636.75 × 39,935.59
  4. Step 4: Simplify right side
    72,206.10x = 3,979,052,396.93
  5. Step 5: Solve for x
    x = 3,979,052,396.93/72,206.10
  6. Step 6: Final answer
    x = 55,106.87

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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.