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Finding the Fourth Proportional to 156,213, 234,390.90 and 85,029

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Solution

The fourth proportional to 156,213, 234,390.90 and 85,029 is: 127,582.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,213 : 234,390.90 = 85,029 : x
  2. Step 2: Convert to fraction form
    156,213/234,390.90 = 85,029/x
  3. Step 3: Cross multiply
    156,213x = 234,390.90 × 85,029
  4. Step 4: Simplify right side
    156,213x = 19,930,023,836.10
  5. Step 5: Solve for x
    x = 19,930,023,836.10/156,213
  6. Step 6: Final answer
    x = 127,582.36

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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.