Home / 99,905.40-138,031.50-98,922.36

Finding the Fourth Proportional to 99,905.40, 138,031.50 and 98,922.36

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Solution

The fourth proportional to 99,905.40, 138,031.50 and 98,922.36 is: 136,673.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,905.40 : 138,031.50 = 98,922.36 : x
  2. Step 2: Convert to fraction form
    99,905.40/138,031.50 = 98,922.36/x
  3. Step 3: Cross multiply
    99,905.40x = 138,031.50 × 98,922.36
  4. Step 4: Simplify right side
    99,905.40x = 13,654,401,734.34
  5. Step 5: Solve for x
    x = 13,654,401,734.34/99,905.40
  6. Step 6: Final answer
    x = 136,673.31

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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.