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Finding the Fourth Proportional to 131,643.70, 197,465.55 and 72,661.30

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Solution

The fourth proportional to 131,643.70, 197,465.55 and 72,661.30 is: 108,991.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,643.70 : 197,465.55 = 72,661.30 : x
  2. Step 2: Convert to fraction form
    131,643.70/197,465.55 = 72,661.30/x
  3. Step 3: Cross multiply
    131,643.70x = 197,465.55 × 72,661.30
  4. Step 4: Simplify right side
    131,643.70x = 14,348,103,568.22
  5. Step 5: Solve for x
    x = 14,348,103,568.22/131,643.70
  6. Step 6: Final answer
    x = 108,991.95

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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.