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Finding the Fourth Proportional to 85,737.92, 128,612.64 and 35,821.76

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Solution

The fourth proportional to 85,737.92, 128,612.64 and 35,821.76 is: 53,735.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,737.92 : 128,612.64 = 35,821.76 : x
  2. Step 2: Convert to fraction form
    85,737.92/128,612.64 = 35,821.76/x
  3. Step 3: Cross multiply
    85,737.92x = 128,612.64 × 35,821.76
  4. Step 4: Simplify right side
    85,737.92x = 4,607,131,123.05
  5. Step 5: Solve for x
    x = 4,607,131,123.05/85,737.92
  6. Step 6: Final answer
    x = 53,735.05

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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.