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Finding the Fourth Proportional to 90,652,051.80, 135,978,077.70 and 51,910,002.90

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Solution

The fourth proportional to 90,652,051.80, 135,978,077.70 and 51,910,002.90 is: 77,865,004.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,652,051.80 : 135,978,077.70 = 51,910,002.90 : x
  2. Step 2: Convert to fraction form
    90,652,051.80/135,978,077.70 = 51,910,002.90/x
  3. Step 3: Cross multiply
    90,652,051.80x = 135,978,077.70 × 51,910,002.90
  4. Step 4: Simplify right side
    90,652,051.80x = 7,058,622,407,743,425
  5. Step 5: Solve for x
    x = 7,058,622,407,743,425/90,652,051.80
  6. Step 6: Final answer
    x = 77,865,004.35

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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.