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Finding the Fourth Proportional to 66,809,781.70, 100,214,672.55 and 56,048,101.45

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Solution

The fourth proportional to 66,809,781.70, 100,214,672.55 and 56,048,101.45 is: 84,072,152.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,809,781.70 : 100,214,672.55 = 56,048,101.45 : x
  2. Step 2: Convert to fraction form
    66,809,781.70/100,214,672.55 = 56,048,101.45/x
  3. Step 3: Cross multiply
    66,809,781.70x = 100,214,672.55 × 56,048,101.45
  4. Step 4: Simplify right side
    66,809,781.70x = 5,616,842,133,860,930
  5. Step 5: Solve for x
    x = 5,616,842,133,860,930/66,809,781.70
  6. Step 6: Final answer
    x = 84,072,152.18

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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.