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Finding the Fourth Proportional to 85,707.95, 128,644.84 and 41,365.91

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Solution

The fourth proportional to 85,707.95, 128,644.84 and 41,365.91 is: 62,088.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,707.95 : 128,644.84 = 41,365.91 : x
  2. Step 2: Convert to fraction form
    85,707.95/128,644.84 = 41,365.91/x
  3. Step 3: Cross multiply
    85,707.95x = 128,644.84 × 41,365.91
  4. Step 4: Simplify right side
    85,707.95x = 5,321,511,246.72
  5. Step 5: Solve for x
    x = 5,321,511,246.72/85,707.95
  6. Step 6: Final answer
    x = 62,088.89

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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.