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Finding the Fourth Proportional to 100,742,427.80, 150,861,699.30 and 80,587,035.80

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Solution

The fourth proportional to 100,742,427.80, 150,861,699.30 and 80,587,035.80 is: 120,679,017.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,742,427.80 : 150,861,699.30 = 80,587,035.80 : x
  2. Step 2: Convert to fraction form
    100,742,427.80/150,861,699.30 = 80,587,035.80/x
  3. Step 3: Cross multiply
    100,742,427.80x = 150,861,699.30 × 80,587,035.80
  4. Step 4: Simplify right side
    100,742,427.80x = 12,157,497,162,337,936
  5. Step 5: Solve for x
    x = 12,157,497,162,337,936/100,742,427.80
  6. Step 6: Final answer
    x = 120,679,017.05

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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.