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Finding the Fourth Proportional to 106,459.80, 159,689.70 and 90,628.35

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Solution

The fourth proportional to 106,459.80, 159,689.70 and 90,628.35 is: 135,942.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,459.80 : 159,689.70 = 90,628.35 : x
  2. Step 2: Convert to fraction form
    106,459.80/159,689.70 = 90,628.35/x
  3. Step 3: Cross multiply
    106,459.80x = 159,689.70 × 90,628.35
  4. Step 4: Simplify right side
    106,459.80x = 14,472,414,023.00
  5. Step 5: Solve for x
    x = 14,472,414,023.00/106,459.80
  6. Step 6: Final answer
    x = 135,942.53

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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.