Home / 137,285.72-189,457.90-76,856.10

Finding the Fourth Proportional to 137,285.72, 189,457.90 and 76,856.10

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Solution

The fourth proportional to 137,285.72, 189,457.90 and 76,856.10 is: 106,063.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,285.72 : 189,457.90 = 76,856.10 : x
  2. Step 2: Convert to fraction form
    137,285.72/189,457.90 = 76,856.10/x
  3. Step 3: Cross multiply
    137,285.72x = 189,457.90 × 76,856.10
  4. Step 4: Simplify right side
    137,285.72x = 14,560,995,308.19
  5. Step 5: Solve for x
    x = 14,560,995,308.19/137,285.72
  6. Step 6: Final answer
    x = 106,063.44

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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.