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Finding the Fourth Proportional to 136,987.58, 205,481.10 and 51,614.40

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Solution

The fourth proportional to 136,987.58, 205,481.10 and 51,614.40 is: 77,421.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,987.58 : 205,481.10 = 51,614.40 : x
  2. Step 2: Convert to fraction form
    136,987.58/205,481.10 = 51,614.40/x
  3. Step 3: Cross multiply
    136,987.58x = 205,481.10 × 51,614.40
  4. Step 4: Simplify right side
    136,987.58x = 10,605,783,687.84
  5. Step 5: Solve for x
    x = 10,605,783,687.84/136,987.58
  6. Step 6: Final answer
    x = 77,421.50

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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.