Home / 72,130.64-99,540.33-40,299.54

Finding the Fourth Proportional to 72,130.64, 99,540.33 and 40,299.54

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Solution

The fourth proportional to 72,130.64, 99,540.33 and 40,299.54 is: 55,613.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,130.64 : 99,540.33 = 40,299.54 : x
  2. Step 2: Convert to fraction form
    72,130.64/99,540.33 = 40,299.54/x
  3. Step 3: Cross multiply
    72,130.64x = 99,540.33 × 40,299.54
  4. Step 4: Simplify right side
    72,130.64x = 4,011,429,545.96
  5. Step 5: Solve for x
    x = 4,011,429,545.96/72,130.64
  6. Step 6: Final answer
    x = 55,613.39

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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.