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Finding the Fourth Proportional to 85,953,608.90, 128,646,978.15 and 60,444,440.90

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Solution

The fourth proportional to 85,953,608.90, 128,646,978.15 and 60,444,440.90 is: 90,467,343.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,953,608.90 : 128,646,978.15 = 60,444,440.90 : x
  2. Step 2: Convert to fraction form
    85,953,608.90/128,646,978.15 = 60,444,440.90/x
  3. Step 3: Cross multiply
    85,953,608.90x = 128,646,978.15 × 60,444,440.90
  4. Step 4: Simplify right side
    85,953,608.90x = 7,775,994,667,751,267
  5. Step 5: Solve for x
    x = 7,775,994,667,751,267/85,953,608.90
  6. Step 6: Final answer
    x = 90,467,343.57

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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.