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Finding the Fourth Proportional to 145,485.16, 218,230.62 and 75,318.76

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Solution

The fourth proportional to 145,485.16, 218,230.62 and 75,318.76 is: 112,979.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,485.16 : 218,230.62 = 75,318.76 : x
  2. Step 2: Convert to fraction form
    145,485.16/218,230.62 = 75,318.76/x
  3. Step 3: Cross multiply
    145,485.16x = 218,230.62 × 75,318.76
  4. Step 4: Simplify right side
    145,485.16x = 16,436,859,692.43
  5. Step 5: Solve for x
    x = 16,436,859,692.43/145,485.16
  6. Step 6: Final answer
    x = 112,979.63

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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.