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Finding the Fourth Proportional to 251,808.84, 347,497.50 and 138,631.56

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Solution

The fourth proportional to 251,808.84, 347,497.50 and 138,631.56 is: 191,312.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,808.84 : 347,497.50 = 138,631.56 : x
  2. Step 2: Convert to fraction form
    251,808.84/347,497.50 = 138,631.56/x
  3. Step 3: Cross multiply
    251,808.84x = 347,497.50 × 138,631.56
  4. Step 4: Simplify right side
    251,808.84x = 48,174,120,521.10
  5. Step 5: Solve for x
    x = 48,174,120,521.10/251,808.84
  6. Step 6: Final answer
    x = 191,312.27

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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.