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Finding the Fourth Proportional to 250,415,999.80, 375,623,999.70 and 68,681,548.60

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Solution

The fourth proportional to 250,415,999.80, 375,623,999.70 and 68,681,548.60 is: 103,022,322.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,415,999.80 : 375,623,999.70 = 68,681,548.60 : x
  2. Step 2: Convert to fraction form
    250,415,999.80/375,623,999.70 = 68,681,548.60/x
  3. Step 3: Cross multiply
    250,415,999.80x = 375,623,999.70 × 68,681,548.60
  4. Step 4: Simplify right side
    250,415,999.80x = 25,798,437,990,721,932
  5. Step 5: Solve for x
    x = 25,798,437,990,721,932/250,415,999.80
  6. Step 6: Final answer
    x = 103,022,322.90

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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.