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Finding the Fourth Proportional to 96,661,139.20, 144,991,708.80 and 78,966,419.20

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Solution

The fourth proportional to 96,661,139.20, 144,991,708.80 and 78,966,419.20 is: 118,449,628.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,661,139.20 : 144,991,708.80 = 78,966,419.20 : x
  2. Step 2: Convert to fraction form
    96,661,139.20/144,991,708.80 = 78,966,419.20/x
  3. Step 3: Cross multiply
    96,661,139.20x = 144,991,708.80 × 78,966,419.20
  4. Step 4: Simplify right side
    96,661,139.20x = 11,449,476,057,625,130
  5. Step 5: Solve for x
    x = 11,449,476,057,625,130/96,661,139.20
  6. Step 6: Final answer
    x = 118,449,628.80

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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.