Home / 65,742.42-90,743.13-38,894.31

Finding the Fourth Proportional to 65,742.42, 90,743.13 and 38,894.31

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Solution

The fourth proportional to 65,742.42, 90,743.13 and 38,894.31 is: 53,685.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,742.42 : 90,743.13 = 38,894.31 : x
  2. Step 2: Convert to fraction form
    65,742.42/90,743.13 = 38,894.31/x
  3. Step 3: Cross multiply
    65,742.42x = 90,743.13 × 38,894.31
  4. Step 4: Simplify right side
    65,742.42x = 3,529,391,428.59
  5. Step 5: Solve for x
    x = 3,529,391,428.59/65,742.42
  6. Step 6: Final answer
    x = 53,685.15

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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.