Home / 100,657.70-138,909.38-55,337.58

Finding the Fourth Proportional to 100,657.70, 138,909.38 and 55,337.58

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Solution

The fourth proportional to 100,657.70, 138,909.38 and 55,337.58 is: 76,366.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,657.70 : 138,909.38 = 55,337.58 : x
  2. Step 2: Convert to fraction form
    100,657.70/138,909.38 = 55,337.58/x
  3. Step 3: Cross multiply
    100,657.70x = 138,909.38 × 55,337.58
  4. Step 4: Simplify right side
    100,657.70x = 7,686,908,928.50
  5. Step 5: Solve for x
    x = 7,686,908,928.50/100,657.70
  6. Step 6: Final answer
    x = 76,366.82

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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.