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Finding the Fourth Proportional to 61,478.80, 84,839.90 and 34,621.64

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Solution

The fourth proportional to 61,478.80, 84,839.90 and 34,621.64 is: 47,777.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,478.80 : 84,839.90 = 34,621.64 : x
  2. Step 2: Convert to fraction form
    61,478.80/84,839.90 = 34,621.64/x
  3. Step 3: Cross multiply
    61,478.80x = 84,839.90 × 34,621.64
  4. Step 4: Simplify right side
    61,478.80x = 2,937,296,475.44
  5. Step 5: Solve for x
    x = 2,937,296,475.44/61,478.80
  6. Step 6: Final answer
    x = 47,777.39

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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.