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Finding the Fourth Proportional to 215,937.80, 323,906.70 and 121,459.40

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Solution

The fourth proportional to 215,937.80, 323,906.70 and 121,459.40 is: 182,189.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,937.80 : 323,906.70 = 121,459.40 : x
  2. Step 2: Convert to fraction form
    215,937.80/323,906.70 = 121,459.40/x
  3. Step 3: Cross multiply
    215,937.80x = 323,906.70 × 121,459.40
  4. Step 4: Simplify right side
    215,937.80x = 39,341,513,437.98
  5. Step 5: Solve for x
    x = 39,341,513,437.98/215,937.80
  6. Step 6: Final answer
    x = 182,189.10

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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.