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Finding the Fourth Proportional to 99,065.50, 136,712.80 and 54,353.50

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Solution

The fourth proportional to 99,065.50, 136,712.80 and 54,353.50 is: 75,009.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,065.50 : 136,712.80 = 54,353.50 : x
  2. Step 2: Convert to fraction form
    99,065.50/136,712.80 = 54,353.50/x
  3. Step 3: Cross multiply
    99,065.50x = 136,712.80 × 54,353.50
  4. Step 4: Simplify right side
    99,065.50x = 7,430,819,174.80
  5. Step 5: Solve for x
    x = 7,430,819,174.80/99,065.50
  6. Step 6: Final answer
    x = 75,009.15

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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.