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Finding the Fourth Proportional to 103,500.70, 155,251.05 and 75,288.40

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Solution

The fourth proportional to 103,500.70, 155,251.05 and 75,288.40 is: 112,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,500.70 : 155,251.05 = 75,288.40 : x
  2. Step 2: Convert to fraction form
    103,500.70/155,251.05 = 75,288.40/x
  3. Step 3: Cross multiply
    103,500.70x = 155,251.05 × 75,288.40
  4. Step 4: Simplify right side
    103,500.70x = 11,688,603,152.82
  5. Step 5: Solve for x
    x = 11,688,603,152.82/103,500.70
  6. Step 6: Final answer
    x = 112,932.60

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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.