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Finding the Fourth Proportional to 212,625,902.80, 318,686,911.80 and 89,803,982.80

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Solution

The fourth proportional to 212,625,902.80, 318,686,911.80 and 89,803,982.80 is: 134,599,564.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,625,902.80 : 318,686,911.80 = 89,803,982.80 : x
  2. Step 2: Convert to fraction form
    212,625,902.80/318,686,911.80 = 89,803,982.80/x
  3. Step 3: Cross multiply
    212,625,902.80x = 318,686,911.80 × 89,803,982.80
  4. Step 4: Simplify right side
    212,625,902.80x = 28,619,353,945,872,316
  5. Step 5: Solve for x
    x = 28,619,353,945,872,316/212,625,902.80
  6. Step 6: Final answer
    x = 134,599,564.63

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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.