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Finding the Fourth Proportional to 68,295,611.80, 102,490,656.90 and 49,140,116.20

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Solution

The fourth proportional to 68,295,611.80, 102,490,656.90 and 49,140,116.20 is: 73,744,163.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,295,611.80 : 102,490,656.90 = 49,140,116.20 : x
  2. Step 2: Convert to fraction form
    68,295,611.80/102,490,656.90 = 49,140,116.20/x
  3. Step 3: Cross multiply
    68,295,611.80x = 102,490,656.90 × 49,140,116.20
  4. Step 4: Simplify right side
    68,295,611.80x = 5,036,402,789,480,332
  5. Step 5: Solve for x
    x = 5,036,402,789,480,332/68,295,611.80
  6. Step 6: Final answer
    x = 73,744,163.89

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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.