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Finding the Fourth Proportional to 118,782.71, 163,920.18 and 65,069.66

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Solution

The fourth proportional to 118,782.71, 163,920.18 and 65,069.66 is: 89,796.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,782.71 : 163,920.18 = 65,069.66 : x
  2. Step 2: Convert to fraction form
    118,782.71/163,920.18 = 65,069.66/x
  3. Step 3: Cross multiply
    118,782.71x = 163,920.18 × 65,069.66
  4. Step 4: Simplify right side
    118,782.71x = 10,666,231,033.55
  5. Step 5: Solve for x
    x = 10,666,231,033.55/118,782.71
  6. Step 6: Final answer
    x = 89,796.16

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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.