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Finding the Fourth Proportional to 136,859.42, 188,856.59 and 75,602.90

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Solution

The fourth proportional to 136,859.42, 188,856.59 and 75,602.90 is: 104,326.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,859.42 : 188,856.59 = 75,602.90 : x
  2. Step 2: Convert to fraction form
    136,859.42/188,856.59 = 75,602.90/x
  3. Step 3: Cross multiply
    136,859.42x = 188,856.59 × 75,602.90
  4. Step 4: Simplify right side
    136,859.42x = 14,278,104,565.81
  5. Step 5: Solve for x
    x = 14,278,104,565.81/136,859.42
  6. Step 6: Final answer
    x = 104,326.80

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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.