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Finding the Fourth Proportional to 61,212.60, 91,818.90 and 54,070.20

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Solution

The fourth proportional to 61,212.60, 91,818.90 and 54,070.20 is: 81,105.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,212.60 : 91,818.90 = 54,070.20 : x
  2. Step 2: Convert to fraction form
    61,212.60/91,818.90 = 54,070.20/x
  3. Step 3: Cross multiply
    61,212.60x = 91,818.90 × 54,070.20
  4. Step 4: Simplify right side
    61,212.60x = 4,964,666,286.78
  5. Step 5: Solve for x
    x = 4,964,666,286.78/61,212.60
  6. Step 6: Final answer
    x = 81,105.30

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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.