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Finding the Fourth Proportional to 128,189.68, 176,905.32 and 70,832.68

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Solution

The fourth proportional to 128,189.68, 176,905.32 and 70,832.68 is: 97,751.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,189.68 : 176,905.32 = 70,832.68 : x
  2. Step 2: Convert to fraction form
    128,189.68/176,905.32 = 70,832.68/x
  3. Step 3: Cross multiply
    128,189.68x = 176,905.32 × 70,832.68
  4. Step 4: Simplify right side
    128,189.68x = 12,530,677,921.86
  5. Step 5: Solve for x
    x = 12,530,677,921.86/128,189.68
  6. Step 6: Final answer
    x = 97,751.07

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.