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Finding the Fourth Proportional to 103,638.85, 155,458.28 and 101,910.85

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Solution

The fourth proportional to 103,638.85, 155,458.28 and 101,910.85 is: 152,866.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.85 : 155,458.28 = 101,910.85 : x
  2. Step 2: Convert to fraction form
    103,638.85/155,458.28 = 101,910.85/x
  3. Step 3: Cross multiply
    103,638.85x = 155,458.28 × 101,910.85
  4. Step 4: Simplify right side
    103,638.85x = 15,842,885,454.34
  5. Step 5: Solve for x
    x = 15,842,885,454.34/103,638.85
  6. Step 6: Final answer
    x = 152,866.28

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1.5x scale

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.