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Finding the Fourth Proportional to 99,239.56, 136,871.36 and 65,283

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Solution

The fourth proportional to 99,239.56, 136,871.36 and 65,283 is: 90,038.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,239.56 : 136,871.36 = 65,283 : x
  2. Step 2: Convert to fraction form
    99,239.56/136,871.36 = 65,283/x
  3. Step 3: Cross multiply
    99,239.56x = 136,871.36 × 65,283
  4. Step 4: Simplify right side
    99,239.56x = 8,935,372,994.88
  5. Step 5: Solve for x
    x = 8,935,372,994.88/99,239.56
  6. Step 6: Final answer
    x = 90,038.42

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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.