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Finding the Fourth Proportional to 215,692.80, 323,539.20 and 121,214.40

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Solution

The fourth proportional to 215,692.80, 323,539.20 and 121,214.40 is: 181,821.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,692.80 : 323,539.20 = 121,214.40 : x
  2. Step 2: Convert to fraction form
    215,692.80/323,539.20 = 121,214.40/x
  3. Step 3: Cross multiply
    215,692.80x = 323,539.20 × 121,214.40
  4. Step 4: Simplify right side
    215,692.80x = 39,217,610,004.48
  5. Step 5: Solve for x
    x = 39,217,610,004.48/215,692.80
  6. Step 6: Final answer
    x = 181,821.60

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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.