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Finding the Fourth Proportional to 243,633.28, 336,216.42 and 136,209.28

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Solution

The fourth proportional to 243,633.28, 336,216.42 and 136,209.28 is: 187,970.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,633.28 : 336,216.42 = 136,209.28 : x
  2. Step 2: Convert to fraction form
    243,633.28/336,216.42 = 136,209.28/x
  3. Step 3: Cross multiply
    243,633.28x = 336,216.42 × 136,209.28
  4. Step 4: Simplify right side
    243,633.28x = 45,795,796,492.38
  5. Step 5: Solve for x
    x = 45,795,796,492.38/243,633.28
  6. Step 6: Final answer
    x = 187,970.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.