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Finding the Fourth Proportional to 103,925.30, 155,498.70 and 74,008.70

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Solution

The fourth proportional to 103,925.30, 155,498.70 and 74,008.70 is: 110,735.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,925.30 : 155,498.70 = 74,008.70 : x
  2. Step 2: Convert to fraction form
    103,925.30/155,498.70 = 74,008.70/x
  3. Step 3: Cross multiply
    103,925.30x = 155,498.70 × 74,008.70
  4. Step 4: Simplify right side
    103,925.30x = 11,508,256,638.69
  5. Step 5: Solve for x
    x = 11,508,256,638.69/103,925.30
  6. Step 6: Final answer
    x = 110,735.85

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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.