Home / 99,139.83-136,813.08-53,817.78

Finding the Fourth Proportional to 99,139.83, 136,813.08 and 53,817.78

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Solution

The fourth proportional to 99,139.83, 136,813.08 and 53,817.78 is: 74,268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,139.83 : 136,813.08 = 53,817.78 : x
  2. Step 2: Convert to fraction form
    99,139.83/136,813.08 = 53,817.78/x
  3. Step 3: Cross multiply
    99,139.83x = 136,813.08 × 53,817.78
  4. Step 4: Simplify right side
    99,139.83x = 7,362,976,240.56
  5. Step 5: Solve for x
    x = 7,362,976,240.56/99,139.83
  6. Step 6: Final answer
    x = 74,268.60

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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.