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Finding the Fourth Proportional to 66,865,237.20, 100,297,855.80 and 38,167,423.20

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Solution

The fourth proportional to 66,865,237.20, 100,297,855.80 and 38,167,423.20 is: 57,251,134.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,865,237.20 : 100,297,855.80 = 38,167,423.20 : x
  2. Step 2: Convert to fraction form
    66,865,237.20/100,297,855.80 = 38,167,423.20/x
  3. Step 3: Cross multiply
    66,865,237.20x = 100,297,855.80 × 38,167,423.20
  4. Step 4: Simplify right side
    66,865,237.20x = 3,828,110,708,371,174.50
  5. Step 5: Solve for x
    x = 3,828,110,708,371,174.50/66,865,237.20
  6. Step 6: Final answer
    x = 57,251,134.80

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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.