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Finding the Fourth Proportional to 98,905,341.60, 148,327,647.12 and 68,395,978.80

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Solution

The fourth proportional to 98,905,341.60, 148,327,647.12 and 68,395,978.80 is: 102,572,969.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,905,341.60 : 148,327,647.12 = 68,395,978.80 : x
  2. Step 2: Convert to fraction form
    98,905,341.60/148,327,647.12 = 68,395,978.80/x
  3. Step 3: Cross multiply
    98,905,341.60x = 148,327,647.12 × 68,395,978.80
  4. Step 4: Simplify right side
    98,905,341.60x = 10,145,014,607,873,400
  5. Step 5: Solve for x
    x = 10,145,014,607,873,400/98,905,341.60
  6. Step 6: Final answer
    x = 102,572,969.71

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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.