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Finding the Fourth Proportional to 70,663.84, 106,011.35 and 39,119.90

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Solution

The fourth proportional to 70,663.84, 106,011.35 and 39,119.90 is: 58,688.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,663.84 : 106,011.35 = 39,119.90 : x
  2. Step 2: Convert to fraction form
    70,663.84/106,011.35 = 39,119.90/x
  3. Step 3: Cross multiply
    70,663.84x = 106,011.35 × 39,119.90
  4. Step 4: Simplify right side
    70,663.84x = 4,147,153,410.87
  5. Step 5: Solve for x
    x = 4,147,153,410.87/70,663.84
  6. Step 6: Final answer
    x = 58,688.48

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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.