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Finding the Fourth Proportional to 85,575.59, 128,393.79 and 38,186.37

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Solution

The fourth proportional to 85,575.59, 128,393.79 and 38,186.37 is: 57,293.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,575.59 : 128,393.79 = 38,186.37 : x
  2. Step 2: Convert to fraction form
    85,575.59/128,393.79 = 38,186.37/x
  3. Step 3: Cross multiply
    85,575.59x = 128,393.79 × 38,186.37
  4. Step 4: Simplify right side
    85,575.59x = 4,902,892,842.24
  5. Step 5: Solve for x
    x = 4,902,892,842.24/85,575.59
  6. Step 6: Final answer
    x = 57,293.12

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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.