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Finding the Fourth Proportional to 285,037.65, 427,570.25 and 74,675.79

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Solution

The fourth proportional to 285,037.65, 427,570.25 and 74,675.79 is: 112,017.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,037.65 : 427,570.25 = 74,675.79 : x
  2. Step 2: Convert to fraction form
    285,037.65/427,570.25 = 74,675.79/x
  3. Step 3: Cross multiply
    285,037.65x = 427,570.25 × 74,675.79
  4. Step 4: Simplify right side
    285,037.65x = 31,929,145,825.87
  5. Step 5: Solve for x
    x = 31,929,145,825.87/285,037.65
  6. Step 6: Final answer
    x = 112,017.29

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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.