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Finding the Fourth Proportional to 66,856,810.40, 100,285,215.60 and 61,117,247.60

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Solution

The fourth proportional to 66,856,810.40, 100,285,215.60 and 61,117,247.60 is: 91,675,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,856,810.40 : 100,285,215.60 = 61,117,247.60 : x
  2. Step 2: Convert to fraction form
    66,856,810.40/100,285,215.60 = 61,117,247.60/x
  3. Step 3: Cross multiply
    66,856,810.40x = 100,285,215.60 × 61,117,247.60
  4. Step 4: Simplify right side
    66,856,810.40x = 6,129,156,352,444,582
  5. Step 5: Solve for x
    x = 6,129,156,352,444,582/66,856,810.40
  6. Step 6: Final answer
    x = 91,675,871.40

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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.