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Finding the Fourth Proportional to 243,146.56, 335,719.99 and 157,156.42

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Solution

The fourth proportional to 243,146.56, 335,719.99 and 157,156.42 is: 216,990.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,146.56 : 335,719.99 = 157,156.42 : x
  2. Step 2: Convert to fraction form
    243,146.56/335,719.99 = 157,156.42/x
  3. Step 3: Cross multiply
    243,146.56x = 335,719.99 × 157,156.42
  4. Step 4: Simplify right side
    243,146.56x = 52,760,551,750.84
  5. Step 5: Solve for x
    x = 52,760,551,750.84/243,146.56
  6. Step 6: Final answer
    x = 216,990.74

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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.