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Finding the Fourth Proportional to 61,781, 85,259.09 and 34,921.91

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Solution

The fourth proportional to 61,781, 85,259.09 and 34,921.91 is: 48,192.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,781 : 85,259.09 = 34,921.91 : x
  2. Step 2: Convert to fraction form
    61,781/85,259.09 = 34,921.91/x
  3. Step 3: Cross multiply
    61,781x = 85,259.09 × 34,921.91
  4. Step 4: Simplify right side
    61,781x = 2,977,410,267.66
  5. Step 5: Solve for x
    x = 2,977,410,267.66/61,781
  6. Step 6: Final answer
    x = 48,192.98

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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.