Home / 100,009.05-137,947.46-64,142.25

Finding the Fourth Proportional to 100,009.05, 137,947.46 and 64,142.25

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Solution

The fourth proportional to 100,009.05, 137,947.46 and 64,142.25 is: 88,474.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,009.05 : 137,947.46 = 64,142.25 : x
  2. Step 2: Convert to fraction form
    100,009.05/137,947.46 = 64,142.25/x
  3. Step 3: Cross multiply
    100,009.05x = 137,947.46 × 64,142.25
  4. Step 4: Simplify right side
    100,009.05x = 8,848,259,800.61
  5. Step 5: Solve for x
    x = 8,848,259,800.61/100,009.05
  6. Step 6: Final answer
    x = 88,474.59

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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.