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Finding the Fourth Proportional to 136,221.79, 187,987 and 75,794.98

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Solution

The fourth proportional to 136,221.79, 187,987 and 75,794.98 is: 104,597.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,221.79 : 187,987 = 75,794.98 : x
  2. Step 2: Convert to fraction form
    136,221.79/187,987 = 75,794.98/x
  3. Step 3: Cross multiply
    136,221.79x = 187,987 × 75,794.98
  4. Step 4: Simplify right side
    136,221.79x = 14,248,470,905.26
  5. Step 5: Solve for x
    x = 14,248,470,905.26/136,221.79
  6. Step 6: Final answer
    x = 104,597.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.