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Finding the Fourth Proportional to 81,344.80, 122,017.20 and 56,461.60

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Solution

The fourth proportional to 81,344.80, 122,017.20 and 56,461.60 is: 84,692.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,344.80 : 122,017.20 = 56,461.60 : x
  2. Step 2: Convert to fraction form
    81,344.80/122,017.20 = 56,461.60/x
  3. Step 3: Cross multiply
    81,344.80x = 122,017.20 × 56,461.60
  4. Step 4: Simplify right side
    81,344.80x = 6,889,286,339.52
  5. Step 5: Solve for x
    x = 6,889,286,339.52/81,344.80
  6. Step 6: Final answer
    x = 84,692.40

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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.