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Finding the Fourth Proportional to 285,607.80, 428,411.70 and 108,120.60

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Solution

The fourth proportional to 285,607.80, 428,411.70 and 108,120.60 is: 162,180.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,607.80 : 428,411.70 = 108,120.60 : x
  2. Step 2: Convert to fraction form
    285,607.80/428,411.70 = 108,120.60/x
  3. Step 3: Cross multiply
    285,607.80x = 428,411.70 × 108,120.60
  4. Step 4: Simplify right side
    285,607.80x = 46,320,130,051.02
  5. Step 5: Solve for x
    x = 46,320,130,051.02/285,607.80
  6. Step 6: Final answer
    x = 162,180.90

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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.