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Finding the Fourth Proportional to 103,925.84, 156,138.44 and 66,558.51

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Solution

The fourth proportional to 103,925.84, 156,138.44 and 66,558.51 is: 99,997.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,925.84 : 156,138.44 = 66,558.51 : x
  2. Step 2: Convert to fraction form
    103,925.84/156,138.44 = 66,558.51/x
  3. Step 3: Cross multiply
    103,925.84x = 156,138.44 × 66,558.51
  4. Step 4: Simplify right side
    103,925.84x = 10,392,341,587.33
  5. Step 5: Solve for x
    x = 10,392,341,587.33/103,925.84
  6. Step 6: Final answer
    x = 99,997.67

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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.