Home / 128,391,378.21-177,180,445.31-69,654,043.33

Finding the Fourth Proportional to 128,391,378.21, 177,180,445.31 and 69,654,043.33

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Solution

The fourth proportional to 128,391,378.21, 177,180,445.31 and 69,654,043.33 is: 96,122,766.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,391,378.21 : 177,180,445.31 = 69,654,043.33 : x
  2. Step 2: Convert to fraction form
    128,391,378.21/177,180,445.31 = 69,654,043.33/x
  3. Step 3: Cross multiply
    128,391,378.21x = 177,180,445.31 × 69,654,043.33
  4. Step 4: Simplify right side
    128,391,378.21x = 12,341,334,414,060,214
  5. Step 5: Solve for x
    x = 12,341,334,414,060,214/128,391,378.21
  6. Step 6: Final answer
    x = 96,122,766.08

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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.