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Finding the Fourth Proportional to 65,199.52, 90,015.06 and 61,178.68

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Solution

The fourth proportional to 65,199.52, 90,015.06 and 61,178.68 is: 84,463.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,199.52 : 90,015.06 = 61,178.68 : x
  2. Step 2: Convert to fraction form
    65,199.52/90,015.06 = 61,178.68/x
  3. Step 3: Cross multiply
    65,199.52x = 90,015.06 × 61,178.68
  4. Step 4: Simplify right side
    65,199.52x = 5,507,002,550.92
  5. Step 5: Solve for x
    x = 5,507,002,550.92/65,199.52
  6. Step 6: Final answer
    x = 84,463.85

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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.