Home / 99,342.20-137,143.03-76,630.20

Finding the Fourth Proportional to 99,342.20, 137,143.03 and 76,630.20

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Solution

The fourth proportional to 99,342.20, 137,143.03 and 76,630.20 is: 105,788.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,342.20 : 137,143.03 = 76,630.20 : x
  2. Step 2: Convert to fraction form
    99,342.20/137,143.03 = 76,630.20/x
  3. Step 3: Cross multiply
    99,342.20x = 137,143.03 × 76,630.20
  4. Step 4: Simplify right side
    99,342.20x = 10,509,297,817.51
  5. Step 5: Solve for x
    x = 10,509,297,817.51/99,342.20
  6. Step 6: Final answer
    x = 105,788.86

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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.