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Finding the Fourth Proportional to 280,870.20, 421,305.30 and 93,881.70

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Solution

The fourth proportional to 280,870.20, 421,305.30 and 93,881.70 is: 140,822.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,870.20 : 421,305.30 = 93,881.70 : x
  2. Step 2: Convert to fraction form
    280,870.20/421,305.30 = 93,881.70/x
  3. Step 3: Cross multiply
    280,870.20x = 421,305.30 × 93,881.70
  4. Step 4: Simplify right side
    280,870.20x = 39,552,857,783.01
  5. Step 5: Solve for x
    x = 39,552,857,783.01/280,870.20
  6. Step 6: Final answer
    x = 140,822.55

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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.