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Finding the Fourth Proportional to 66,874,580.80, 100,311,871.20 and 56,670,913.60

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Solution

The fourth proportional to 66,874,580.80, 100,311,871.20 and 56,670,913.60 is: 85,006,370.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,874,580.80 : 100,311,871.20 = 56,670,913.60 : x
  2. Step 2: Convert to fraction form
    66,874,580.80/100,311,871.20 = 56,670,913.60/x
  3. Step 3: Cross multiply
    66,874,580.80x = 100,311,871.20 × 56,670,913.60
  4. Step 4: Simplify right side
    66,874,580.80x = 5,684,765,385,829,529
  5. Step 5: Solve for x
    x = 5,684,765,385,829,529/66,874,580.80
  6. Step 6: Final answer
    x = 85,006,370.40

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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.