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Finding the Fourth Proportional to 89,628.60, 134,442.90 and 82,870.20

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Solution

The fourth proportional to 89,628.60, 134,442.90 and 82,870.20 is: 124,305.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,628.60 : 134,442.90 = 82,870.20 : x
  2. Step 2: Convert to fraction form
    89,628.60/134,442.90 = 82,870.20/x
  3. Step 3: Cross multiply
    89,628.60x = 134,442.90 × 82,870.20
  4. Step 4: Simplify right side
    89,628.60x = 11,141,310,011.58
  5. Step 5: Solve for x
    x = 11,141,310,011.58/89,628.60
  6. Step 6: Final answer
    x = 124,305.30

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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.