Home / 72,138.42-99,551.52-40,308.66

Finding the Fourth Proportional to 72,138.42, 99,551.52 and 40,308.66

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Solution

The fourth proportional to 72,138.42, 99,551.52 and 40,308.66 is: 55,626.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,138.42 : 99,551.52 = 40,308.66 : x
  2. Step 2: Convert to fraction form
    72,138.42/99,551.52 = 40,308.66/x
  3. Step 3: Cross multiply
    72,138.42x = 99,551.52 × 40,308.66
  4. Step 4: Simplify right side
    72,138.42x = 4,012,788,372.16
  5. Step 5: Solve for x
    x = 4,012,788,372.16/72,138.42
  6. Step 6: Final answer
    x = 55,626.23

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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.