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Finding the Fourth Proportional to 86,116.59, 118,860.89 and 54,328.95

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Solution

The fourth proportional to 86,116.59, 118,860.89 and 54,328.95 is: 74,986.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,116.59 : 118,860.89 = 54,328.95 : x
  2. Step 2: Convert to fraction form
    86,116.59/118,860.89 = 54,328.95/x
  3. Step 3: Cross multiply
    86,116.59x = 118,860.89 × 54,328.95
  4. Step 4: Simplify right side
    86,116.59x = 6,457,587,078.12
  5. Step 5: Solve for x
    x = 6,457,587,078.12/86,116.59
  6. Step 6: Final answer
    x = 74,986.56

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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.