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Finding the Fourth Proportional to 163,813.70, 245,728.65 and 85,081.70

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Solution

The fourth proportional to 163,813.70, 245,728.65 and 85,081.70 is: 127,626.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,813.70 : 245,728.65 = 85,081.70 : x
  2. Step 2: Convert to fraction form
    163,813.70/245,728.65 = 85,081.70/x
  3. Step 3: Cross multiply
    163,813.70x = 245,728.65 × 85,081.70
  4. Step 4: Simplify right side
    163,813.70x = 20,907,011,280.71
  5. Step 5: Solve for x
    x = 20,907,011,280.71/163,813.70
  6. Step 6: Final answer
    x = 127,626.76

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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.