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Finding the Fourth Proportional to 85,358.48, 128,038.20 and 32,755.28

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Solution

The fourth proportional to 85,358.48, 128,038.20 and 32,755.28 is: 49,133.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,358.48 : 128,038.20 = 32,755.28 : x
  2. Step 2: Convert to fraction form
    85,358.48/128,038.20 = 32,755.28/x
  3. Step 3: Cross multiply
    85,358.48x = 128,038.20 × 32,755.28
  4. Step 4: Simplify right side
    85,358.48x = 4,193,927,091.70
  5. Step 5: Solve for x
    x = 4,193,927,091.70/85,358.48
  6. Step 6: Final answer
    x = 49,133.10

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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.