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Finding the Fourth Proportional to 86,497.58, 129,700.94 and 39,071.81

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Solution

The fourth proportional to 86,497.58, 129,700.94 and 39,071.81 is: 58,587.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,497.58 : 129,700.94 = 39,071.81 : x
  2. Step 2: Convert to fraction form
    86,497.58/129,700.94 = 39,071.81/x
  3. Step 3: Cross multiply
    86,497.58x = 129,700.94 × 39,071.81
  4. Step 4: Simplify right side
    86,497.58x = 5,067,649,640.64
  5. Step 5: Solve for x
    x = 5,067,649,640.64/86,497.58
  6. Step 6: Final answer
    x = 58,587.19

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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.