Home / 85,778.48-118,419.11-66,615.26

Finding the Fourth Proportional to 85,778.48, 118,419.11 and 66,615.26

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Solution

The fourth proportional to 85,778.48, 118,419.11 and 66,615.26 is: 91,963.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,778.48 : 118,419.11 = 66,615.26 : x
  2. Step 2: Convert to fraction form
    85,778.48/118,419.11 = 66,615.26/x
  3. Step 3: Cross multiply
    85,778.48x = 118,419.11 × 66,615.26
  4. Step 4: Simplify right side
    85,778.48x = 7,888,518,876.45
  5. Step 5: Solve for x
    x = 7,888,518,876.45/85,778.48
  6. Step 6: Final answer
    x = 91,963.85

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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.