Home / 90,635.40-135,953.10-89,979.30

Finding the Fourth Proportional to 90,635.40, 135,953.10 and 89,979.30

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Solution

The fourth proportional to 90,635.40, 135,953.10 and 89,979.30 is: 134,968.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,635.40 : 135,953.10 = 89,979.30 : x
  2. Step 2: Convert to fraction form
    90,635.40/135,953.10 = 89,979.30/x
  3. Step 3: Cross multiply
    90,635.40x = 135,953.10 × 89,979.30
  4. Step 4: Simplify right side
    90,635.40x = 12,232,964,770.83
  5. Step 5: Solve for x
    x = 12,232,964,770.83/90,635.40
  6. Step 6: Final answer
    x = 134,968.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.