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Finding the Fourth Proportional to 280,702.40, 421,057.20 and 93,713.90

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Solution

The fourth proportional to 280,702.40, 421,057.20 and 93,713.90 is: 140,572.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,702.40 : 421,057.20 = 93,713.90 : x
  2. Step 2: Convert to fraction form
    280,702.40/421,057.20 = 93,713.90/x
  3. Step 3: Cross multiply
    280,702.40x = 421,057.20 × 93,713.90
  4. Step 4: Simplify right side
    280,702.40x = 39,458,912,335.08
  5. Step 5: Solve for x
    x = 39,458,912,335.08/280,702.40
  6. Step 6: Final answer
    x = 140,572.05

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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.