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Finding the Fourth Proportional to 66,438,438.40, 99,657,657.60 and 66,438,438.40

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Solution

The fourth proportional to 66,438,438.40, 99,657,657.60 and 66,438,438.40 is: 99,657,657.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438,438.40 : 99,657,657.60 = 66,438,438.40 : x
  2. Step 2: Convert to fraction form
    66,438,438.40/99,657,657.60 = 66,438,438.40/x
  3. Step 3: Cross multiply
    66,438,438.40x = 99,657,657.60 × 66,438,438.40
  4. Step 4: Simplify right side
    66,438,438.40x = 6,621,099,145,545,891
  5. Step 5: Solve for x
    x = 6,621,099,145,545,891/66,438,438.40
  6. Step 6: Final answer
    x = 99,657,657.60

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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.