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Finding the Fourth Proportional to 60,579,704.20, 90,870,074.70 and 20,190,188.20

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Solution

The fourth proportional to 60,579,704.20, 90,870,074.70 and 20,190,188.20 is: 30,285,455.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,579,704.20 : 90,870,074.70 = 20,190,188.20 : x
  2. Step 2: Convert to fraction form
    60,579,704.20/90,870,074.70 = 20,190,188.20/x
  3. Step 3: Cross multiply
    60,579,704.20x = 90,870,074.70 × 20,190,188.20
  4. Step 4: Simplify right side
    60,579,704.20x = 1,834,683,909,941,058.50
  5. Step 5: Solve for x
    x = 1,834,683,909,941,058.50/60,579,704.20
  6. Step 6: Final answer
    x = 30,285,455.07

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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.