Home / 71,220.15-106,742.75-39,989.79

Finding the Fourth Proportional to 71,220.15, 106,742.75 and 39,989.79

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Solution

The fourth proportional to 71,220.15, 106,742.75 and 39,989.79 is: 59,935.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,220.15 : 106,742.75 = 39,989.79 : x
  2. Step 2: Convert to fraction form
    71,220.15/106,742.75 = 39,989.79/x
  3. Step 3: Cross multiply
    71,220.15x = 106,742.75 × 39,989.79
  4. Step 4: Simplify right side
    71,220.15x = 4,268,619,956.57
  5. Step 5: Solve for x
    x = 4,268,619,956.57/71,220.15
  6. Step 6: Final answer
    x = 59,935.57

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1.5x scale

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.