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Finding the Fourth Proportional to 85,801.75, 128,722.08 and 30,397.75

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Solution

The fourth proportional to 85,801.75, 128,722.08 and 30,397.75 is: 45,603.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,801.75 : 128,722.08 = 30,397.75 : x
  2. Step 2: Convert to fraction form
    85,801.75/128,722.08 = 30,397.75/x
  3. Step 3: Cross multiply
    85,801.75x = 128,722.08 × 30,397.75
  4. Step 4: Simplify right side
    85,801.75x = 3,912,861,607.32
  5. Step 5: Solve for x
    x = 3,912,861,607.32/85,801.75
  6. Step 6: Final answer
    x = 45,603.52

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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.