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Finding the Fourth Proportional to 159,789,718.92, 220,509,737.46 and 90,189,697.80

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Solution

The fourth proportional to 159,789,718.92, 220,509,737.46 and 90,189,697.80 is: 124,461,740.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,789,718.92 : 220,509,737.46 = 90,189,697.80 : x
  2. Step 2: Convert to fraction form
    159,789,718.92/220,509,737.46 = 90,189,697.80/x
  3. Step 3: Cross multiply
    159,789,718.92x = 220,509,737.46 × 90,189,697.80
  4. Step 4: Simplify right side
    159,789,718.92x = 19,887,706,583,474,740
  5. Step 5: Solve for x
    x = 19,887,706,583,474,740/159,789,718.92
  6. Step 6: Final answer
    x = 124,461,740.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.