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Finding the Fourth Proportional to 118,388.80, 163,374.42 and 64,672.39

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Solution

The fourth proportional to 118,388.80, 163,374.42 and 64,672.39 is: 89,246.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,388.80 : 163,374.42 = 64,672.39 : x
  2. Step 2: Convert to fraction form
    118,388.80/163,374.42 = 64,672.39/x
  3. Step 3: Cross multiply
    118,388.80x = 163,374.42 × 64,672.39
  4. Step 4: Simplify right side
    118,388.80x = 10,565,814,206.26
  5. Step 5: Solve for x
    x = 10,565,814,206.26/118,388.80
  6. Step 6: Final answer
    x = 89,246.74

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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.