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Finding the Fourth Proportional to 85,380.94, 128,053.06 and 25,394.98

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Solution

The fourth proportional to 85,380.94, 128,053.06 and 25,394.98 is: 38,087.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,380.94 : 128,053.06 = 25,394.98 : x
  2. Step 2: Convert to fraction form
    85,380.94/128,053.06 = 25,394.98/x
  3. Step 3: Cross multiply
    85,380.94x = 128,053.06 × 25,394.98
  4. Step 4: Simplify right side
    85,380.94x = 3,251,904,897.64
  5. Step 5: Solve for x
    x = 3,251,904,897.64/85,380.94
  6. Step 6: Final answer
    x = 38,087.01

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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.