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Finding the Fourth Proportional to 98,654,158.80, 147,768,661.80 and 81,648,046.80

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Solution

The fourth proportional to 98,654,158.80, 147,768,661.80 and 81,648,046.80 is: 122,296,137.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,654,158.80 : 147,768,661.80 = 81,648,046.80 : x
  2. Step 2: Convert to fraction form
    98,654,158.80/147,768,661.80 = 81,648,046.80/x
  3. Step 3: Cross multiply
    98,654,158.80x = 147,768,661.80 × 81,648,046.80
  4. Step 4: Simplify right side
    98,654,158.80x = 12,065,022,614,219,772
  5. Step 5: Solve for x
    x = 12,065,022,614,219,772/98,654,158.80
  6. Step 6: Final answer
    x = 122,296,137.95

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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.