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Finding the Fourth Proportional to 351,809.75, 527,710.23 and 85,570.45

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Solution

The fourth proportional to 351,809.75, 527,710.23 and 85,570.45 is: 128,354.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,809.75 : 527,710.23 = 85,570.45 : x
  2. Step 2: Convert to fraction form
    351,809.75/527,710.23 = 85,570.45/x
  3. Step 3: Cross multiply
    351,809.75x = 527,710.23 × 85,570.45
  4. Step 4: Simplify right side
    351,809.75x = 45,156,400,531.43
  5. Step 5: Solve for x
    x = 45,156,400,531.43/351,809.75
  6. Step 6: Final answer
    x = 128,354.60

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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.