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Finding the Fourth Proportional to 99,434,968.80, 148,900,510.80 and 79,279,576.80

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Solution

The fourth proportional to 99,434,968.80, 148,900,510.80 and 79,279,576.80 is: 118,718,491.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,434,968.80 : 148,900,510.80 = 79,279,576.80 : x
  2. Step 2: Convert to fraction form
    99,434,968.80/148,900,510.80 = 79,279,576.80/x
  3. Step 3: Cross multiply
    99,434,968.80x = 148,900,510.80 × 79,279,576.80
  4. Step 4: Simplify right side
    99,434,968.80x = 11,804,769,481,527,830
  5. Step 5: Solve for x
    x = 11,804,769,481,527,830/99,434,968.80
  6. Step 6: Final answer
    x = 118,718,491.33

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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.