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Finding the Fourth Proportional to 8,257,978.20, 12,381,062.40 and 3,705,300.30

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Solution

The fourth proportional to 8,257,978.20, 12,381,062.40 and 3,705,300.30 is: 5,555,300.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,257,978.20 : 12,381,062.40 = 3,705,300.30 : x
  2. Step 2: Convert to fraction form
    8,257,978.20/12,381,062.40 = 3,705,300.30/x
  3. Step 3: Cross multiply
    8,257,978.20x = 12,381,062.40 × 3,705,300.30
  4. Step 4: Simplify right side
    8,257,978.20x = 45,875,554,225,038.72
  5. Step 5: Solve for x
    x = 45,875,554,225,038.72/8,257,978.20
  6. Step 6: Final answer
    x = 5,555,300.96

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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.