Home / 72,003.80-99,365.28-40,172.70

Finding the Fourth Proportional to 72,003.80, 99,365.28 and 40,172.70

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Solution

The fourth proportional to 72,003.80, 99,365.28 and 40,172.70 is: 55,438.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,003.80 : 99,365.28 = 40,172.70 : x
  2. Step 2: Convert to fraction form
    72,003.80/99,365.28 = 40,172.70/x
  3. Step 3: Cross multiply
    72,003.80x = 99,365.28 × 40,172.70
  4. Step 4: Simplify right side
    72,003.80x = 3,991,771,583.86
  5. Step 5: Solve for x
    x = 3,991,771,583.86/72,003.80
  6. Step 6: Final answer
    x = 55,438.35

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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.