Home / 99,342.21-137,143.02-76,630.21

Finding the Fourth Proportional to 99,342.21, 137,143.02 and 76,630.21

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Solution

The fourth proportional to 99,342.21, 137,143.02 and 76,630.21 is: 105,788.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,342.21 : 137,143.02 = 76,630.21 : x
  2. Step 2: Convert to fraction form
    99,342.21/137,143.02 = 76,630.21/x
  3. Step 3: Cross multiply
    99,342.21x = 137,143.02 × 76,630.21
  4. Step 4: Simplify right side
    99,342.21x = 10,509,298,422.63
  5. Step 5: Solve for x
    x = 10,509,298,422.63/99,342.21
  6. Step 6: Final answer
    x = 105,788.85

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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.