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Finding the Fourth Proportional to 72,763.81, 100,328.15 and 49,804.70

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Solution

The fourth proportional to 72,763.81, 100,328.15 and 49,804.70 is: 68,671.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,763.81 : 100,328.15 = 49,804.70 : x
  2. Step 2: Convert to fraction form
    72,763.81/100,328.15 = 49,804.70/x
  3. Step 3: Cross multiply
    72,763.81x = 100,328.15 × 49,804.70
  4. Step 4: Simplify right side
    72,763.81x = 4,996,813,035.18
  5. Step 5: Solve for x
    x = 4,996,813,035.18/72,763.81
  6. Step 6: Final answer
    x = 68,671.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.