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Finding the Fourth Proportional to 66,503,599.40, 99,830,048.70 and 51,424,380.20

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Solution

The fourth proportional to 66,503,599.40, 99,830,048.70 and 51,424,380.20 is: 77,194,293.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,503,599.40 : 99,830,048.70 = 51,424,380.20 : x
  2. Step 2: Convert to fraction form
    66,503,599.40/99,830,048.70 = 51,424,380.20/x
  3. Step 3: Cross multiply
    66,503,599.40x = 99,830,048.70 × 51,424,380.20
  4. Step 4: Simplify right side
    66,503,599.40x = 5,133,698,379,733,316
  5. Step 5: Solve for x
    x = 5,133,698,379,733,316/66,503,599.40
  6. Step 6: Final answer
    x = 77,194,293.63

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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.