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Finding the Fourth Proportional to 116,891.87, 161,307.56 and 65,904.16

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Solution

The fourth proportional to 116,891.87, 161,307.56 and 65,904.16 is: 90,945.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,891.87 : 161,307.56 = 65,904.16 : x
  2. Step 2: Convert to fraction form
    116,891.87/161,307.56 = 65,904.16/x
  3. Step 3: Cross multiply
    116,891.87x = 161,307.56 × 65,904.16
  4. Step 4: Simplify right side
    116,891.87x = 10,630,838,331.78
  5. Step 5: Solve for x
    x = 10,630,838,331.78/116,891.87
  6. Step 6: Final answer
    x = 90,945.92

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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.