Home / 99,621.30-137,652.39-79,643.10

Finding the Fourth Proportional to 99,621.30, 137,652.39 and 79,643.10

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Solution

The fourth proportional to 99,621.30, 137,652.39 and 79,643.10 is: 110,047.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,621.30 : 137,652.39 = 79,643.10 : x
  2. Step 2: Convert to fraction form
    99,621.30/137,652.39 = 79,643.10/x
  3. Step 3: Cross multiply
    99,621.30x = 137,652.39 × 79,643.10
  4. Step 4: Simplify right side
    99,621.30x = 10,963,063,062.01
  5. Step 5: Solve for x
    x = 10,963,063,062.01/99,621.30
  6. Step 6: Final answer
    x = 110,047.38

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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.