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Finding the Fourth Proportional to 118,643.66, 163,728.23 and 64,928.71

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Solution

The fourth proportional to 118,643.66, 163,728.23 and 64,928.71 is: 89,601.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,643.66 : 163,728.23 = 64,928.71 : x
  2. Step 2: Convert to fraction form
    118,643.66/163,728.23 = 64,928.71/x
  3. Step 3: Cross multiply
    118,643.66x = 163,728.23 × 64,928.71
  4. Step 4: Simplify right side
    118,643.66x = 10,630,662,764.48
  5. Step 5: Solve for x
    x = 10,630,662,764.48/118,643.66
  6. Step 6: Final answer
    x = 89,601.61

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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.