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Finding the Fourth Proportional to 297,071.60, 445,672.20 and 86,692.40

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Solution

The fourth proportional to 297,071.60, 445,672.20 and 86,692.40 is: 130,057.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,071.60 : 445,672.20 = 86,692.40 : x
  2. Step 2: Convert to fraction form
    297,071.60/445,672.20 = 86,692.40/x
  3. Step 3: Cross multiply
    297,071.60x = 445,672.20 × 86,692.40
  4. Step 4: Simplify right side
    297,071.60x = 38,636,392,631.28
  5. Step 5: Solve for x
    x = 38,636,392,631.28/297,071.60
  6. Step 6: Final answer
    x = 130,057.51

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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.