Home / 221,346.60-331,818.30-81,071.40

Finding the Fourth Proportional to 221,346.60, 331,818.30 and 81,071.40

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Solution

The fourth proportional to 221,346.60, 331,818.30 and 81,071.40 is: 121,533.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,346.60 : 331,818.30 = 81,071.40 : x
  2. Step 2: Convert to fraction form
    221,346.60/331,818.30 = 81,071.40/x
  3. Step 3: Cross multiply
    221,346.60x = 331,818.30 × 81,071.40
  4. Step 4: Simplify right side
    221,346.60x = 26,900,974,126.62
  5. Step 5: Solve for x
    x = 26,900,974,126.62/221,346.60
  6. Step 6: Final answer
    x = 121,533.26

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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.