Home / 99,107.47-136,729.38-56,643.22

Finding the Fourth Proportional to 99,107.47, 136,729.38 and 56,643.22

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Solution

The fourth proportional to 99,107.47, 136,729.38 and 56,643.22 is: 78,145.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,107.47 : 136,729.38 = 56,643.22 : x
  2. Step 2: Convert to fraction form
    99,107.47/136,729.38 = 56,643.22/x
  3. Step 3: Cross multiply
    99,107.47x = 136,729.38 × 56,643.22
  4. Step 4: Simplify right side
    99,107.47x = 7,744,792,351.80
  5. Step 5: Solve for x
    x = 7,744,792,351.80/99,107.47
  6. Step 6: Final answer
    x = 78,145.39

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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.