Home / 72,166.50-99,588.05-40,338.36

Finding the Fourth Proportional to 72,166.50, 99,588.05 and 40,338.36

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Solution

The fourth proportional to 72,166.50, 99,588.05 and 40,338.36 is: 55,665.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,166.50 : 99,588.05 = 40,338.36 : x
  2. Step 2: Convert to fraction form
    72,166.50/99,588.05 = 40,338.36/x
  3. Step 3: Cross multiply
    72,166.50x = 99,588.05 × 40,338.36
  4. Step 4: Simplify right side
    72,166.50x = 4,017,218,410.91
  5. Step 5: Solve for x
    x = 4,017,218,410.91/72,166.50
  6. Step 6: Final answer
    x = 55,665.97

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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.