Home / 99,138.20-136,810.80-53,816.18

Finding the Fourth Proportional to 99,138.20, 136,810.80 and 53,816.18

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Solution

The fourth proportional to 99,138.20, 136,810.80 and 53,816.18 is: 74,266.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,138.20 : 136,810.80 = 53,816.18 : x
  2. Step 2: Convert to fraction form
    99,138.20/136,810.80 = 53,816.18/x
  3. Step 3: Cross multiply
    99,138.20x = 136,810.80 × 53,816.18
  4. Step 4: Simplify right side
    99,138.20x = 7,362,633,954.69
  5. Step 5: Solve for x
    x = 7,362,633,954.69/99,138.20
  6. Step 6: Final answer
    x = 74,266.37

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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.