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Finding the Fourth Proportional to 113,612.75, 156,783.43 and 61,930.30

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Solution

The fourth proportional to 113,612.75, 156,783.43 and 61,930.30 is: 85,462.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,612.75 : 156,783.43 = 61,930.30 : x
  2. Step 2: Convert to fraction form
    113,612.75/156,783.43 = 61,930.30/x
  3. Step 3: Cross multiply
    113,612.75x = 156,783.43 × 61,930.30
  4. Step 4: Simplify right side
    113,612.75x = 9,709,644,308.14
  5. Step 5: Solve for x
    x = 9,709,644,308.14/113,612.75
  6. Step 6: Final answer
    x = 85,462.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.