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Finding the Fourth Proportional to 117,744.16, 162,534 and 72,440.68

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Solution

The fourth proportional to 117,744.16, 162,534 and 72,440.68 is: 99,997.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,744.16 : 162,534 = 72,440.68 : x
  2. Step 2: Convert to fraction form
    117,744.16/162,534 = 72,440.68/x
  3. Step 3: Cross multiply
    117,744.16x = 162,534 × 72,440.68
  4. Step 4: Simplify right side
    117,744.16x = 11,774,073,483.12
  5. Step 5: Solve for x
    x = 11,774,073,483.12/117,744.16
  6. Step 6: Final answer
    x = 99,997.09

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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.