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Finding the Fourth Proportional to 85,752.05, 128,671.95 and 40,824.18

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Solution

The fourth proportional to 85,752.05, 128,671.95 and 40,824.18 is: 61,257.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,752.05 : 128,671.95 = 40,824.18 : x
  2. Step 2: Convert to fraction form
    85,752.05/128,671.95 = 40,824.18/x
  3. Step 3: Cross multiply
    85,752.05x = 128,671.95 × 40,824.18
  4. Step 4: Simplify right side
    85,752.05x = 5,252,926,847.75
  5. Step 5: Solve for x
    x = 5,252,926,847.75/85,752.05
  6. Step 6: Final answer
    x = 61,257.16

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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.