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Finding the Fourth Proportional to 136,898.37, 188,920.41 and 76,471.56

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Solution

The fourth proportional to 136,898.37, 188,920.41 and 76,471.56 is: 105,531.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,898.37 : 188,920.41 = 76,471.56 : x
  2. Step 2: Convert to fraction form
    136,898.37/188,920.41 = 76,471.56/x
  3. Step 3: Cross multiply
    136,898.37x = 188,920.41 × 76,471.56
  4. Step 4: Simplify right side
    136,898.37x = 14,447,039,463.76
  5. Step 5: Solve for x
    x = 14,447,039,463.76/136,898.37
  6. Step 6: Final answer
    x = 105,531.13

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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.