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Finding the Fourth Proportional to 66,428,815.80, 99,643,223.70 and 37,763,369.40

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Solution

The fourth proportional to 66,428,815.80, 99,643,223.70 and 37,763,369.40 is: 56,645,054.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428,815.80 : 99,643,223.70 = 37,763,369.40 : x
  2. Step 2: Convert to fraction form
    66,428,815.80/99,643,223.70 = 37,763,369.40/x
  3. Step 3: Cross multiply
    66,428,815.80x = 99,643,223.70 × 37,763,369.40
  4. Step 4: Simplify right side
    66,428,815.80x = 3,762,863,864,789,934.50
  5. Step 5: Solve for x
    x = 3,762,863,864,789,934.50/66,428,815.80
  6. Step 6: Final answer
    x = 56,645,054.10

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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.