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Finding the Fourth Proportional to 86,336.72, 129,362.52 and 39,486.32

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Solution

The fourth proportional to 86,336.72, 129,362.52 and 39,486.32 is: 59,164.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,336.72 : 129,362.52 = 39,486.32 : x
  2. Step 2: Convert to fraction form
    86,336.72/129,362.52 = 39,486.32/x
  3. Step 3: Cross multiply
    86,336.72x = 129,362.52 × 39,486.32
  4. Step 4: Simplify right side
    86,336.72x = 5,108,049,860.73
  5. Step 5: Solve for x
    x = 5,108,049,860.73/86,336.72
  6. Step 6: Final answer
    x = 59,164.28

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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.