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Finding the Fourth Proportional to 123,670,415.80, 185,505,623.70 and 42,891,383.80

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Solution

The fourth proportional to 123,670,415.80, 185,505,623.70 and 42,891,383.80 is: 64,337,075.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,670,415.80 : 185,505,623.70 = 42,891,383.80 : x
  2. Step 2: Convert to fraction form
    123,670,415.80/185,505,623.70 = 42,891,383.80/x
  3. Step 3: Cross multiply
    123,670,415.80x = 185,505,623.70 × 42,891,383.80
  4. Step 4: Simplify right side
    123,670,415.80x = 7,956,592,903,175,075
  5. Step 5: Solve for x
    x = 7,956,592,903,175,075/123,670,415.80
  6. Step 6: Final answer
    x = 64,337,075.70

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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.