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Finding the Fourth Proportional to 118,628.40, 163,705.80 and 64,912.80

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Solution

The fourth proportional to 118,628.40, 163,705.80 and 64,912.80 is: 89,578.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,628.40 : 163,705.80 = 64,912.80 : x
  2. Step 2: Convert to fraction form
    118,628.40/163,705.80 = 64,912.80/x
  3. Step 3: Cross multiply
    118,628.40x = 163,705.80 × 64,912.80
  4. Step 4: Simplify right side
    118,628.40x = 10,626,601,854.24
  5. Step 5: Solve for x
    x = 10,626,601,854.24/118,628.40
  6. Step 6: Final answer
    x = 89,578.90

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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.