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Finding the Fourth Proportional to 285,048.90, 427,587.12 and 74,687.04

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Solution

The fourth proportional to 285,048.90, 427,587.12 and 74,687.04 is: 112,034.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,048.90 : 427,587.12 = 74,687.04 : x
  2. Step 2: Convert to fraction form
    285,048.90/427,587.12 = 74,687.04/x
  3. Step 3: Cross multiply
    285,048.90x = 427,587.12 × 74,687.04
  4. Step 4: Simplify right side
    285,048.90x = 31,935,216,334.92
  5. Step 5: Solve for x
    x = 31,935,216,334.92/285,048.90
  6. Step 6: Final answer
    x = 112,034.17

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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.