Home / 99,031.05-136,672.25-56,581.38

Finding the Fourth Proportional to 99,031.05, 136,672.25 and 56,581.38

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Solution

The fourth proportional to 99,031.05, 136,672.25 and 56,581.38 is: 78,087.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,031.05 : 136,672.25 = 56,581.38 : x
  2. Step 2: Convert to fraction form
    99,031.05/136,672.25 = 56,581.38/x
  3. Step 3: Cross multiply
    99,031.05x = 136,672.25 × 56,581.38
  4. Step 4: Simplify right side
    99,031.05x = 7,733,104,229.80
  5. Step 5: Solve for x
    x = 7,733,104,229.80/99,031.05
  6. Step 6: Final answer
    x = 78,087.67

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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.