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Finding the Fourth Proportional to 285,090.80, 427,636.20 and 118,857.20

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Solution

The fourth proportional to 285,090.80, 427,636.20 and 118,857.20 is: 178,285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,090.80 : 427,636.20 = 118,857.20 : x
  2. Step 2: Convert to fraction form
    285,090.80/427,636.20 = 118,857.20/x
  3. Step 3: Cross multiply
    285,090.80x = 427,636.20 × 118,857.20
  4. Step 4: Simplify right side
    285,090.80x = 50,827,641,350.64
  5. Step 5: Solve for x
    x = 50,827,641,350.64/285,090.80
  6. Step 6: Final answer
    x = 178,285.80

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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.