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Finding the Fourth Proportional to 286,044.40, 429,066.60 and 72,811.90

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Solution

The fourth proportional to 286,044.40, 429,066.60 and 72,811.90 is: 109,217.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,044.40 : 429,066.60 = 72,811.90 : x
  2. Step 2: Convert to fraction form
    286,044.40/429,066.60 = 72,811.90/x
  3. Step 3: Cross multiply
    286,044.40x = 429,066.60 × 72,811.90
  4. Step 4: Simplify right side
    286,044.40x = 31,241,154,372.54
  5. Step 5: Solve for x
    x = 31,241,154,372.54/286,044.40
  6. Step 6: Final answer
    x = 109,217.85

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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.