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Finding the Fourth Proportional to 66,199,201.80, 99,298,802.70 and 20,760,923.40

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Solution

The fourth proportional to 66,199,201.80, 99,298,802.70 and 20,760,923.40 is: 31,141,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,199,201.80 : 99,298,802.70 = 20,760,923.40 : x
  2. Step 2: Convert to fraction form
    66,199,201.80/99,298,802.70 = 20,760,923.40/x
  3. Step 3: Cross multiply
    66,199,201.80x = 99,298,802.70 × 20,760,923.40
  4. Step 4: Simplify right side
    66,199,201.80x = 2,061,534,836,566,413
  5. Step 5: Solve for x
    x = 2,061,534,836,566,413/66,199,201.80
  6. Step 6: Final answer
    x = 31,141,385.10

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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.