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Finding the Fourth Proportional to 85,553.40, 128,135.70 and 54,060.60

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Solution

The fourth proportional to 85,553.40, 128,135.70 and 54,060.60 is: 80,968.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,553.40 : 128,135.70 = 54,060.60 : x
  2. Step 2: Convert to fraction form
    85,553.40/128,135.70 = 54,060.60/x
  3. Step 3: Cross multiply
    85,553.40x = 128,135.70 × 54,060.60
  4. Step 4: Simplify right side
    85,553.40x = 6,927,092,823.42
  5. Step 5: Solve for x
    x = 6,927,092,823.42/85,553.40
  6. Step 6: Final answer
    x = 80,968.06

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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.