Home / 72,459.18-99,991.53-40,629.42

Finding the Fourth Proportional to 72,459.18, 99,991.53 and 40,629.42

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Solution

The fourth proportional to 72,459.18, 99,991.53 and 40,629.42 is: 56,067.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,459.18 : 99,991.53 = 40,629.42 : x
  2. Step 2: Convert to fraction form
    72,459.18/99,991.53 = 40,629.42/x
  3. Step 3: Cross multiply
    72,459.18x = 99,991.53 × 40,629.42
  4. Step 4: Simplify right side
    72,459.18x = 4,062,597,868.81
  5. Step 5: Solve for x
    x = 4,062,597,868.81/72,459.18
  6. Step 6: Final answer
    x = 56,067.40

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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.