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Finding the Fourth Proportional to 72,859,996.80, 109,415,966.40 and 38,847,772.80

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Solution

The fourth proportional to 72,859,996.80, 109,415,966.40 and 38,847,772.80 is: 58,338,825.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,859,996.80 : 109,415,966.40 = 38,847,772.80 : x
  2. Step 2: Convert to fraction form
    72,859,996.80/109,415,966.40 = 38,847,772.80/x
  3. Step 3: Cross multiply
    72,859,996.80x = 109,415,966.40 × 38,847,772.80
  4. Step 4: Simplify right side
    72,859,996.80x = 4,250,566,603,399,634
  5. Step 5: Solve for x
    x = 4,250,566,603,399,634/72,859,996.80
  6. Step 6: Final answer
    x = 58,338,825.01

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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.