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Finding the Fourth Proportional to 143,392.16, 197,880.72 and 79,730

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Solution

The fourth proportional to 143,392.16, 197,880.72 and 79,730 is: 110,027.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,392.16 : 197,880.72 = 79,730 : x
  2. Step 2: Convert to fraction form
    143,392.16/197,880.72 = 79,730/x
  3. Step 3: Cross multiply
    143,392.16x = 197,880.72 × 79,730
  4. Step 4: Simplify right side
    143,392.16x = 15,777,029,805.60
  5. Step 5: Solve for x
    x = 15,777,029,805.60/143,392.16
  6. Step 6: Final answer
    x = 110,027.14

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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.