Home / 99,343.21-137,144.40-76,631.21

Finding the Fourth Proportional to 99,343.21, 137,144.40 and 76,631.21

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Solution

The fourth proportional to 99,343.21, 137,144.40 and 76,631.21 is: 105,790.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,343.21 : 137,144.40 = 76,631.21 : x
  2. Step 2: Convert to fraction form
    99,343.21/137,144.40 = 76,631.21/x
  3. Step 3: Cross multiply
    99,343.21x = 137,144.40 × 76,631.21
  4. Step 4: Simplify right side
    99,343.21x = 10,509,541,316.72
  5. Step 5: Solve for x
    x = 10,509,541,316.72/99,343.21
  6. Step 6: Final answer
    x = 105,790.23

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1.5x scale

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.