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Finding the Fourth Proportional to 45,685, 68,537.58 and 19,412.20

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Solution

The fourth proportional to 45,685, 68,537.58 and 19,412.20 is: 29,122.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,685 : 68,537.58 = 19,412.20 : x
  2. Step 2: Convert to fraction form
    45,685/68,537.58 = 19,412.20/x
  3. Step 3: Cross multiply
    45,685x = 68,537.58 × 19,412.20
  4. Step 4: Simplify right side
    45,685x = 1,330,465,210.48
  5. Step 5: Solve for x
    x = 1,330,465,210.48/45,685
  6. Step 6: Final answer
    x = 29,122.58

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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.