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Finding the Fourth Proportional to 70,389.72, 105,600.15 and 38,783.51

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Solution

The fourth proportional to 70,389.72, 105,600.15 and 38,783.51 is: 58,183.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,389.72 : 105,600.15 = 38,783.51 : x
  2. Step 2: Convert to fraction form
    70,389.72/105,600.15 = 38,783.51/x
  3. Step 3: Cross multiply
    70,389.72x = 105,600.15 × 38,783.51
  4. Step 4: Simplify right side
    70,389.72x = 4,095,543,945.53
  5. Step 5: Solve for x
    x = 4,095,543,945.53/70,389.72
  6. Step 6: Final answer
    x = 58,183.84

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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.