Home / 99,928.25-137,908.85-56,909.56

Finding the Fourth Proportional to 99,928.25, 137,908.85 and 56,909.56

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Solution

The fourth proportional to 99,928.25, 137,908.85 and 56,909.56 is: 78,539.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,928.25 : 137,908.85 = 56,909.56 : x
  2. Step 2: Convert to fraction form
    99,928.25/137,908.85 = 56,909.56/x
  3. Step 3: Cross multiply
    99,928.25x = 137,908.85 × 56,909.56
  4. Step 4: Simplify right side
    99,928.25x = 7,848,331,973.61
  5. Step 5: Solve for x
    x = 7,848,331,973.61/99,928.25
  6. Step 6: Final answer
    x = 78,539.67

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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.