Home / 136,861.05-188,871.21-85,875.78

Finding the Fourth Proportional to 136,861.05, 188,871.21 and 85,875.78

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Solution

The fourth proportional to 136,861.05, 188,871.21 and 85,875.78 is: 118,510.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,861.05 : 188,871.21 = 85,875.78 : x
  2. Step 2: Convert to fraction form
    136,861.05/188,871.21 = 85,875.78/x
  3. Step 3: Cross multiply
    136,861.05x = 188,871.21 × 85,875.78
  4. Step 4: Simplify right side
    136,861.05x = 16,219,462,478.29
  5. Step 5: Solve for x
    x = 16,219,462,478.29/136,861.05
  6. Step 6: Final answer
    x = 118,510.43

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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.