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Finding the Fourth Proportional to 221,307.80, 331,880.70 and 71,587.40

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Solution

The fourth proportional to 221,307.80, 331,880.70 and 71,587.40 is: 107,354.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,307.80 : 331,880.70 = 71,587.40 : x
  2. Step 2: Convert to fraction form
    221,307.80/331,880.70 = 71,587.40/x
  3. Step 3: Cross multiply
    221,307.80x = 331,880.70 × 71,587.40
  4. Step 4: Simplify right side
    221,307.80x = 23,758,476,423.18
  5. Step 5: Solve for x
    x = 23,758,476,423.18/221,307.80
  6. Step 6: Final answer
    x = 107,354.90

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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.