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Finding the Fourth Proportional to 45,785.80, 68,678.70 and 19,491.40

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Solution

The fourth proportional to 45,785.80, 68,678.70 and 19,491.40 is: 29,237.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,785.80 : 68,678.70 = 19,491.40 : x
  2. Step 2: Convert to fraction form
    45,785.80/68,678.70 = 19,491.40/x
  3. Step 3: Cross multiply
    45,785.80x = 68,678.70 × 19,491.40
  4. Step 4: Simplify right side
    45,785.80x = 1,338,644,013.18
  5. Step 5: Solve for x
    x = 1,338,644,013.18/45,785.80
  6. Step 6: Final answer
    x = 29,237.10

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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.