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Finding the Fourth Proportional to 85,512.70, 128,256.90 and 29,355.40

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Solution

The fourth proportional to 85,512.70, 128,256.90 and 29,355.40 is: 44,028.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,512.70 : 128,256.90 = 29,355.40 : x
  2. Step 2: Convert to fraction form
    85,512.70/128,256.90 = 29,355.40/x
  3. Step 3: Cross multiply
    85,512.70x = 128,256.90 × 29,355.40
  4. Step 4: Simplify right side
    85,512.70x = 3,765,032,602.26
  5. Step 5: Solve for x
    x = 3,765,032,602.26/85,512.70
  6. Step 6: Final answer
    x = 44,028.93

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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.