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Finding the Fourth Proportional to 71,435.66, 107,142.96 and 18,848.84

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Solution

The fourth proportional to 71,435.66, 107,142.96 and 18,848.84 is: 28,270.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,435.66 : 107,142.96 = 18,848.84 : x
  2. Step 2: Convert to fraction form
    71,435.66/107,142.96 = 18,848.84/x
  3. Step 3: Cross multiply
    71,435.66x = 107,142.96 × 18,848.84
  4. Step 4: Simplify right side
    71,435.66x = 2,019,520,510.17
  5. Step 5: Solve for x
    x = 2,019,520,510.17/71,435.66
  6. Step 6: Final answer
    x = 28,270.48

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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.