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Finding the Fourth Proportional to 85,376.21, 128,154.49 and 47,968.25

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Solution

The fourth proportional to 85,376.21, 128,154.49 and 47,968.25 is: 72,003.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,376.21 : 128,154.49 = 47,968.25 : x
  2. Step 2: Convert to fraction form
    85,376.21/128,154.49 = 47,968.25/x
  3. Step 3: Cross multiply
    85,376.21x = 128,154.49 × 47,968.25
  4. Step 4: Simplify right side
    85,376.21x = 6,147,345,854.25
  5. Step 5: Solve for x
    x = 6,147,345,854.25/85,376.21
  6. Step 6: Final answer
    x = 72,003.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.