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Finding the Fourth Proportional to 155,803.95, 215,009.55 and 84,183.96

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Solution

The fourth proportional to 155,803.95, 215,009.55 and 84,183.96 is: 116,173.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,803.95 : 215,009.55 = 84,183.96 : x
  2. Step 2: Convert to fraction form
    155,803.95/215,009.55 = 84,183.96/x
  3. Step 3: Cross multiply
    155,803.95x = 215,009.55 × 84,183.96
  4. Step 4: Simplify right side
    155,803.95x = 18,100,355,356.82
  5. Step 5: Solve for x
    x = 18,100,355,356.82/155,803.95
  6. Step 6: Final answer
    x = 116,173.92

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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.