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Finding the Fourth Proportional to 103,917.30, 155,486.70 and 74,000.70

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Solution

The fourth proportional to 103,917.30, 155,486.70 and 74,000.70 is: 110,723.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,917.30 : 155,486.70 = 74,000.70 : x
  2. Step 2: Convert to fraction form
    103,917.30/155,486.70 = 74,000.70/x
  3. Step 3: Cross multiply
    103,917.30x = 155,486.70 × 74,000.70
  4. Step 4: Simplify right side
    103,917.30x = 11,506,124,640.69
  5. Step 5: Solve for x
    x = 11,506,124,640.69/103,917.30
  6. Step 6: Final answer
    x = 110,723.86

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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.