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Finding the Fourth Proportional to 54,307.20, 81,460.80 and 47,740.80

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Solution

The fourth proportional to 54,307.20, 81,460.80 and 47,740.80 is: 71,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,307.20 : 81,460.80 = 47,740.80 : x
  2. Step 2: Convert to fraction form
    54,307.20/81,460.80 = 47,740.80/x
  3. Step 3: Cross multiply
    54,307.20x = 81,460.80 × 47,740.80
  4. Step 4: Simplify right side
    54,307.20x = 3,889,003,760.64
  5. Step 5: Solve for x
    x = 3,889,003,760.64/54,307.20
  6. Step 6: Final answer
    x = 71,611.20

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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.