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Finding the Fourth Proportional to 201,011.40, 301,079.70 and 121,987.80

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Solution

The fourth proportional to 201,011.40, 301,079.70 and 121,987.80 is: 182,716.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,011.40 : 301,079.70 = 121,987.80 : x
  2. Step 2: Convert to fraction form
    201,011.40/301,079.70 = 121,987.80/x
  3. Step 3: Cross multiply
    201,011.40x = 301,079.70 × 121,987.80
  4. Step 4: Simplify right side
    201,011.40x = 36,728,050,227.66
  5. Step 5: Solve for x
    x = 36,728,050,227.66/201,011.40
  6. Step 6: Final answer
    x = 182,716.26

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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.