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Finding the Fourth Proportional to 117,931.60, 162,758.60 and 72,600.49

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Solution

The fourth proportional to 117,931.60, 162,758.60 and 72,600.49 is: 100,196.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,931.60 : 162,758.60 = 72,600.49 : x
  2. Step 2: Convert to fraction form
    117,931.60/162,758.60 = 72,600.49/x
  3. Step 3: Cross multiply
    117,931.60x = 162,758.60 × 72,600.49
  4. Step 4: Simplify right side
    117,931.60x = 11,816,354,111.71
  5. Step 5: Solve for x
    x = 11,816,354,111.71/117,931.60
  6. Step 6: Final answer
    x = 100,196.67

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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.