Home / 81,638,699.72-122,458,218.06-76,650,240.20

Finding the Fourth Proportional to 81,638,699.72, 122,458,218.06 and 76,650,240.20

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Solution

The fourth proportional to 81,638,699.72, 122,458,218.06 and 76,650,240.20 is: 114,975,518.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,638,699.72 : 122,458,218.06 = 76,650,240.20 : x
  2. Step 2: Convert to fraction form
    81,638,699.72/122,458,218.06 = 76,650,240.20/x
  3. Step 3: Cross multiply
    81,638,699.72x = 122,458,218.06 × 76,650,240.20
  4. Step 4: Simplify right side
    81,638,699.72x = 9,386,451,828,762,978
  5. Step 5: Solve for x
    x = 9,386,451,828,762,978/81,638,699.72
  6. Step 6: Final answer
    x = 114,975,518.49

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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.