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Finding the Fourth Proportional to 85,840.48, 128,817.84 and 35,280.97

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Solution

The fourth proportional to 85,840.48, 128,817.84 and 35,280.97 is: 52,944.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840.48 : 128,817.84 = 35,280.97 : x
  2. Step 2: Convert to fraction form
    85,840.48/128,817.84 = 35,280.97/x
  3. Step 3: Cross multiply
    85,840.48x = 128,817.84 × 35,280.97
  4. Step 4: Simplify right side
    85,840.48x = 4,544,818,348.50
  5. Step 5: Solve for x
    x = 4,544,818,348.50/85,840.48
  6. Step 6: Final answer
    x = 52,944.93

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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.