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Finding the Fourth Proportional to 243,987.45, 365,890.62 and 84,018.72

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Solution

The fourth proportional to 243,987.45, 365,890.62 and 84,018.72 is: 125,996.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,987.45 : 365,890.62 = 84,018.72 : x
  2. Step 2: Convert to fraction form
    243,987.45/365,890.62 = 84,018.72/x
  3. Step 3: Cross multiply
    243,987.45x = 365,890.62 × 84,018.72
  4. Step 4: Simplify right side
    243,987.45x = 30,741,661,552.41
  5. Step 5: Solve for x
    x = 30,741,661,552.41/243,987.45
  6. Step 6: Final answer
    x = 125,996.90

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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.