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Finding the Fourth Proportional to 215,526.80, 323,635.80 and 145,715.60

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Solution

The fourth proportional to 215,526.80, 323,635.80 and 145,715.60 is: 218,807.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,526.80 : 323,635.80 = 145,715.60 : x
  2. Step 2: Convert to fraction form
    215,526.80/323,635.80 = 145,715.60/x
  3. Step 3: Cross multiply
    215,526.80x = 323,635.80 × 145,715.60
  4. Step 4: Simplify right side
    215,526.80x = 47,158,784,778.48
  5. Step 5: Solve for x
    x = 47,158,784,778.48/215,526.80
  6. Step 6: Final answer
    x = 218,807.06

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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.