Home / 86,907,893.76-120,038,995.36-64,978,645.20

Finding the Fourth Proportional to 86,907,893.76, 120,038,995.36 and 64,978,645.20

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Solution

The fourth proportional to 86,907,893.76, 120,038,995.36 and 64,978,645.20 is: 89,749,859.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,907,893.76 : 120,038,995.36 = 64,978,645.20 : x
  2. Step 2: Convert to fraction form
    86,907,893.76/120,038,995.36 = 64,978,645.20/x
  3. Step 3: Cross multiply
    86,907,893.76x = 120,038,995.36 × 64,978,645.20
  4. Step 4: Simplify right side
    86,907,893.76x = 7,799,971,289,661,887
  5. Step 5: Solve for x
    x = 7,799,971,289,661,887/86,907,893.76
  6. Step 6: Final answer
    x = 89,749,859.91

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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.