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Finding the Fourth Proportional to 85,414.60, 128,122.35 and 56,018.59

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Solution

The fourth proportional to 85,414.60, 128,122.35 and 56,018.59 is: 84,028.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,414.60 : 128,122.35 = 56,018.59 : x
  2. Step 2: Convert to fraction form
    85,414.60/128,122.35 = 56,018.59/x
  3. Step 3: Cross multiply
    85,414.60x = 128,122.35 × 56,018.59
  4. Step 4: Simplify right side
    85,414.60x = 7,177,232,893.92
  5. Step 5: Solve for x
    x = 7,177,232,893.92/85,414.60
  6. Step 6: Final answer
    x = 84,028.18

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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.