Home / 137,538.70-189,803.25-77,109.36

Finding the Fourth Proportional to 137,538.70, 189,803.25 and 77,109.36

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Solution

The fourth proportional to 137,538.70, 189,803.25 and 77,109.36 is: 106,410.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,538.70 : 189,803.25 = 77,109.36 : x
  2. Step 2: Convert to fraction form
    137,538.70/189,803.25 = 77,109.36/x
  3. Step 3: Cross multiply
    137,538.70x = 189,803.25 × 77,109.36
  4. Step 4: Simplify right side
    137,538.70x = 14,635,607,133.42
  5. Step 5: Solve for x
    x = 14,635,607,133.42/137,538.70
  6. Step 6: Final answer
    x = 106,410.83

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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.