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Finding the Fourth Proportional to 136,859.85, 188,856.30 and 85,869.93

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Solution

The fourth proportional to 136,859.85, 188,856.30 and 85,869.93 is: 118,494.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,859.85 : 188,856.30 = 85,869.93 : x
  2. Step 2: Convert to fraction form
    136,859.85/188,856.30 = 85,869.93/x
  3. Step 3: Cross multiply
    136,859.85x = 188,856.30 × 85,869.93
  4. Step 4: Simplify right side
    136,859.85x = 16,217,077,261.06
  5. Step 5: Solve for x
    x = 16,217,077,261.06/136,859.85
  6. Step 6: Final answer
    x = 118,494.05

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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.