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Finding the Fourth Proportional to 54,421.80, 81,611.10 and 19,343.40

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Solution

The fourth proportional to 54,421.80, 81,611.10 and 19,343.40 is: 29,007.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,421.80 : 81,611.10 = 19,343.40 : x
  2. Step 2: Convert to fraction form
    54,421.80/81,611.10 = 19,343.40/x
  3. Step 3: Cross multiply
    54,421.80x = 81,611.10 × 19,343.40
  4. Step 4: Simplify right side
    54,421.80x = 1,578,636,151.74
  5. Step 5: Solve for x
    x = 1,578,636,151.74/54,421.80
  6. Step 6: Final answer
    x = 29,007.42

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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.