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Finding the Fourth Proportional to 121,280,369.48, 167,383,978.98 and 77,213,291.48

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Solution

The fourth proportional to 121,280,369.48, 167,383,978.98 and 77,213,291.48 is: 106,565,209.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,280,369.48 : 167,383,978.98 = 77,213,291.48 : x
  2. Step 2: Convert to fraction form
    121,280,369.48/167,383,978.98 = 77,213,291.48/x
  3. Step 3: Cross multiply
    121,280,369.48x = 167,383,978.98 × 77,213,291.48
  4. Step 4: Simplify right side
    121,280,369.48x = 12,924,267,958,064,932
  5. Step 5: Solve for x
    x = 12,924,267,958,064,932/121,280,369.48
  6. Step 6: Final answer
    x = 106,565,209.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.