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Finding the Fourth Proportional to 55,620, 83,438.64 and 18,692.64

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Solution

The fourth proportional to 55,620, 83,438.64 and 18,692.64 is: 28,041.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,620 : 83,438.64 = 18,692.64 : x
  2. Step 2: Convert to fraction form
    55,620/83,438.64 = 18,692.64/x
  3. Step 3: Cross multiply
    55,620x = 83,438.64 × 18,692.64
  4. Step 4: Simplify right side
    55,620x = 1,559,688,459.61
  5. Step 5: Solve for x
    x = 1,559,688,459.61/55,620
  6. Step 6: Final answer
    x = 28,041.86

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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.