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Finding the Fourth Proportional to 209,337.60, 314,079.30 and 91,093.80

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Solution

The fourth proportional to 209,337.60, 314,079.30 and 91,093.80 is: 136,672.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,337.60 : 314,079.30 = 91,093.80 : x
  2. Step 2: Convert to fraction form
    209,337.60/314,079.30 = 91,093.80/x
  3. Step 3: Cross multiply
    209,337.60x = 314,079.30 × 91,093.80
  4. Step 4: Simplify right side
    209,337.60x = 28,610,676,938.34
  5. Step 5: Solve for x
    x = 28,610,676,938.34/209,337.60
  6. Step 6: Final answer
    x = 136,672.42

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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.