Home / 72,129.39-99,535.38-40,297.60

Finding the Fourth Proportional to 72,129.39, 99,535.38 and 40,297.60

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Solution

The fourth proportional to 72,129.39, 99,535.38 and 40,297.60 is: 55,608.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,129.39 : 99,535.38 = 40,297.60 : x
  2. Step 2: Convert to fraction form
    72,129.39/99,535.38 = 40,297.60/x
  3. Step 3: Cross multiply
    72,129.39x = 99,535.38 × 40,297.60
  4. Step 4: Simplify right side
    72,129.39x = 4,011,037,129.07
  5. Step 5: Solve for x
    x = 4,011,037,129.07/72,129.39
  6. Step 6: Final answer
    x = 55,608.92

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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.