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Finding the Fourth Proportional to 85,315, 117,727.32 and 55,101.64

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Solution

The fourth proportional to 85,315, 117,727.32 and 55,101.64 is: 76,035.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,315 : 117,727.32 = 55,101.64 : x
  2. Step 2: Convert to fraction form
    85,315/117,727.32 = 55,101.64/x
  3. Step 3: Cross multiply
    85,315x = 117,727.32 × 55,101.64
  4. Step 4: Simplify right side
    85,315x = 6,486,968,404.80
  5. Step 5: Solve for x
    x = 6,486,968,404.80/85,315
  6. Step 6: Final answer
    x = 76,035.50

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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.