Home / 128,407,788.95-177,200,514.07-78,153,842.25

Finding the Fourth Proportional to 128,407,788.95, 177,200,514.07 and 78,153,842.25

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Solution

The fourth proportional to 128,407,788.95, 177,200,514.07 and 78,153,842.25 is: 107,850,942.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,407,788.95 : 177,200,514.07 = 78,153,842.25 : x
  2. Step 2: Convert to fraction form
    128,407,788.95/177,200,514.07 = 78,153,842.25/x
  3. Step 3: Cross multiply
    128,407,788.95x = 177,200,514.07 × 78,153,842.25
  4. Step 4: Simplify right side
    128,407,788.95x = 13,848,901,023,050,300
  5. Step 5: Solve for x
    x = 13,848,901,023,050,300/128,407,788.95
  6. Step 6: Final answer
    x = 107,850,942.20

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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.