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Finding the Fourth Proportional to 61,173.68, 91,612.20 and 31,108.82

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Solution

The fourth proportional to 61,173.68, 91,612.20 and 31,108.82 is: 46,587.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,173.68 : 91,612.20 = 31,108.82 : x
  2. Step 2: Convert to fraction form
    61,173.68/91,612.20 = 31,108.82/x
  3. Step 3: Cross multiply
    61,173.68x = 91,612.20 × 31,108.82
  4. Step 4: Simplify right side
    61,173.68x = 2,849,947,439.60
  5. Step 5: Solve for x
    x = 2,849,947,439.60/61,173.68
  6. Step 6: Final answer
    x = 46,587.80

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1.5x scale

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.