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Finding the Fourth Proportional to 356,748.76, 535,122.06 and 90,508.78

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Solution

The fourth proportional to 356,748.76, 535,122.06 and 90,508.78 is: 135,762.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,748.76 : 535,122.06 = 90,508.78 : x
  2. Step 2: Convert to fraction form
    356,748.76/535,122.06 = 90,508.78/x
  3. Step 3: Cross multiply
    356,748.76x = 535,122.06 × 90,508.78
  4. Step 4: Simplify right side
    356,748.76x = 48,433,244,801.69
  5. Step 5: Solve for x
    x = 48,433,244,801.69/356,748.76
  6. Step 6: Final answer
    x = 135,762.90

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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.