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Finding the Fourth Proportional to 163,813.20, 245,727.90 and 85,081.20

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Solution

The fourth proportional to 163,813.20, 245,727.90 and 85,081.20 is: 127,626.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,813.20 : 245,727.90 = 85,081.20 : x
  2. Step 2: Convert to fraction form
    163,813.20/245,727.90 = 85,081.20/x
  3. Step 3: Cross multiply
    163,813.20x = 245,727.90 × 85,081.20
  4. Step 4: Simplify right side
    163,813.20x = 20,906,824,605.48
  5. Step 5: Solve for x
    x = 20,906,824,605.48/163,813.20
  6. Step 6: Final answer
    x = 127,626.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.