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Finding the Fourth Proportional to 61,221.80, 91,832.70 and 53,445.80

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Solution

The fourth proportional to 61,221.80, 91,832.70 and 53,445.80 is: 80,168.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,221.80 : 91,832.70 = 53,445.80 : x
  2. Step 2: Convert to fraction form
    61,221.80/91,832.70 = 53,445.80/x
  3. Step 3: Cross multiply
    61,221.80x = 91,832.70 × 53,445.80
  4. Step 4: Simplify right side
    61,221.80x = 4,908,072,117.66
  5. Step 5: Solve for x
    x = 4,908,072,117.66/61,221.80
  6. Step 6: Final answer
    x = 80,168.70

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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.