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Finding the Fourth Proportional to 85,932.77, 128,993.40 and 68,276.88

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Solution

The fourth proportional to 85,932.77, 128,993.40 and 68,276.88 is: 102,490.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,932.77 : 128,993.40 = 68,276.88 : x
  2. Step 2: Convert to fraction form
    85,932.77/128,993.40 = 68,276.88/x
  3. Step 3: Cross multiply
    85,932.77x = 128,993.40 × 68,276.88
  4. Step 4: Simplify right side
    85,932.77x = 8,807,266,892.59
  5. Step 5: Solve for x
    x = 8,807,266,892.59/85,932.77
  6. Step 6: Final answer
    x = 102,490.21

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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.