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Finding the Fourth Proportional to 131,903.40, 197,855.10 and 43,159.80

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Solution

The fourth proportional to 131,903.40, 197,855.10 and 43,159.80 is: 64,739.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,903.40 : 197,855.10 = 43,159.80 : x
  2. Step 2: Convert to fraction form
    131,903.40/197,855.10 = 43,159.80/x
  3. Step 3: Cross multiply
    131,903.40x = 197,855.10 × 43,159.80
  4. Step 4: Simplify right side
    131,903.40x = 8,539,386,544.98
  5. Step 5: Solve for x
    x = 8,539,386,544.98/131,903.40
  6. Step 6: Final answer
    x = 64,739.70

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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.