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Finding the Fourth Proportional to 118,439.70, 163,445.79 and 64,724.25

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Solution

The fourth proportional to 118,439.70, 163,445.79 and 64,724.25 is: 89,318.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,439.70 : 163,445.79 = 64,724.25 : x
  2. Step 2: Convert to fraction form
    118,439.70/163,445.79 = 64,724.25/x
  3. Step 3: Cross multiply
    118,439.70x = 163,445.79 × 64,724.25
  4. Step 4: Simplify right side
    118,439.70x = 10,578,906,173.41
  5. Step 5: Solve for x
    x = 10,578,906,173.41/118,439.70
  6. Step 6: Final answer
    x = 89,318.92

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1.5x scale

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.