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Finding the Fourth Proportional to 138,859.79, 191,626.51 and 75,197.58

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Solution

The fourth proportional to 138,859.79, 191,626.51 and 75,197.58 is: 103,772.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,859.79 : 191,626.51 = 75,197.58 : x
  2. Step 2: Convert to fraction form
    138,859.79/191,626.51 = 75,197.58/x
  3. Step 3: Cross multiply
    138,859.79x = 191,626.51 × 75,197.58
  4. Step 4: Simplify right side
    138,859.79x = 14,409,850,128.15
  5. Step 5: Solve for x
    x = 14,409,850,128.15/138,859.79
  6. Step 6: Final answer
    x = 103,772.67

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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.