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Finding the Fourth Proportional to 85,583.78, 118,065.86 and 55,378.85

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Solution

The fourth proportional to 85,583.78, 118,065.86 and 55,378.85 is: 76,397.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,583.78 : 118,065.86 = 55,378.85 : x
  2. Step 2: Convert to fraction form
    85,583.78/118,065.86 = 55,378.85/x
  3. Step 3: Cross multiply
    85,583.78x = 118,065.86 × 55,378.85
  4. Step 4: Simplify right side
    85,583.78x = 6,538,350,683.84
  5. Step 5: Solve for x
    x = 6,538,350,683.84/85,583.78
  6. Step 6: Final answer
    x = 76,397.08

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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.