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Finding the Fourth Proportional to 85,539.71, 128,301.31 and 26,359.49

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Solution

The fourth proportional to 85,539.71, 128,301.31 and 26,359.49 is: 39,536.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,539.71 : 128,301.31 = 26,359.49 : x
  2. Step 2: Convert to fraction form
    85,539.71/128,301.31 = 26,359.49/x
  3. Step 3: Cross multiply
    85,539.71x = 128,301.31 × 26,359.49
  4. Step 4: Simplify right side
    85,539.71x = 3,381,957,097.93
  5. Step 5: Solve for x
    x = 3,381,957,097.93/85,539.71
  6. Step 6: Final answer
    x = 39,536.69

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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.