Home / 85,781.28-118,395-51,795.36

Finding the Fourth Proportional to 85,781.28, 118,395 and 51,795.36

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Solution

The fourth proportional to 85,781.28, 118,395 and 51,795.36 is: 71,487.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,781.28 : 118,395 = 51,795.36 : x
  2. Step 2: Convert to fraction form
    85,781.28/118,395 = 51,795.36/x
  3. Step 3: Cross multiply
    85,781.28x = 118,395 × 51,795.36
  4. Step 4: Simplify right side
    85,781.28x = 6,132,311,647.20
  5. Step 5: Solve for x
    x = 6,132,311,647.20/85,781.28
  6. Step 6: Final answer
    x = 71,487.76

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1.5x scale

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.