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Finding the Fourth Proportional to 279,670.02, 385,915.86 and 157,142.94

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Solution

The fourth proportional to 279,670.02, 385,915.86 and 157,142.94 is: 216,841.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,670.02 : 385,915.86 = 157,142.94 : x
  2. Step 2: Convert to fraction form
    279,670.02/385,915.86 = 157,142.94/x
  3. Step 3: Cross multiply
    279,670.02x = 385,915.86 × 157,142.94
  4. Step 4: Simplify right side
    279,670.02x = 60,643,951,385.84
  5. Step 5: Solve for x
    x = 60,643,951,385.84/279,670.02
  6. Step 6: Final answer
    x = 216,841.09

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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.