Home / 81,318.90-121,908.18-39,140.94

Finding the Fourth Proportional to 81,318.90, 121,908.18 and 39,140.94

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Solution

The fourth proportional to 81,318.90, 121,908.18 and 39,140.94 is: 58,677.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,318.90 : 121,908.18 = 39,140.94 : x
  2. Step 2: Convert to fraction form
    81,318.90/121,908.18 = 39,140.94/x
  3. Step 3: Cross multiply
    81,318.90x = 121,908.18 × 39,140.94
  4. Step 4: Simplify right side
    81,318.90x = 4,771,600,758.89
  5. Step 5: Solve for x
    x = 4,771,600,758.89/81,318.90
  6. Step 6: Final answer
    x = 58,677.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.