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Finding the Fourth Proportional to 243,612.20, 365,409.80 and 85,837.16

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Solution

The fourth proportional to 243,612.20, 365,409.80 and 85,837.16 is: 128,752.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,612.20 : 365,409.80 = 85,837.16 : x
  2. Step 2: Convert to fraction form
    243,612.20/365,409.80 = 85,837.16/x
  3. Step 3: Cross multiply
    243,612.20x = 365,409.80 × 85,837.16
  4. Step 4: Simplify right side
    243,612.20x = 31,365,739,468.17
  5. Step 5: Solve for x
    x = 31,365,739,468.17/243,612.20
  6. Step 6: Final answer
    x = 128,752.75

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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.