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Finding the Fourth Proportional to 85,392.78, 128,088.90 and 23,063.28

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Solution

The fourth proportional to 85,392.78, 128,088.90 and 23,063.28 is: 34,594.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,392.78 : 128,088.90 = 23,063.28 : x
  2. Step 2: Convert to fraction form
    85,392.78/128,088.90 = 23,063.28/x
  3. Step 3: Cross multiply
    85,392.78x = 128,088.90 × 23,063.28
  4. Step 4: Simplify right side
    85,392.78x = 2,954,150,165.59
  5. Step 5: Solve for x
    x = 2,954,150,165.59/85,392.78
  6. Step 6: Final answer
    x = 34,594.85

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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.