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Finding the Fourth Proportional to 86,310.96, 118,828.80 and 68,309.52

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Solution

The fourth proportional to 86,310.96, 118,828.80 and 68,309.52 is: 94,045.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,310.96 : 118,828.80 = 68,309.52 : x
  2. Step 2: Convert to fraction form
    86,310.96/118,828.80 = 68,309.52/x
  3. Step 3: Cross multiply
    86,310.96x = 118,828.80 × 68,309.52
  4. Step 4: Simplify right side
    86,310.96x = 8,117,138,290.18
  5. Step 5: Solve for x
    x = 8,117,138,290.18/86,310.96
  6. Step 6: Final answer
    x = 94,045.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.