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Finding the Fourth Proportional to 161,428.80, 241,989.60 and 125,870.40

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Solution

The fourth proportional to 161,428.80, 241,989.60 and 125,870.40 is: 188,685.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,428.80 : 241,989.60 = 125,870.40 : x
  2. Step 2: Convert to fraction form
    161,428.80/241,989.60 = 125,870.40/x
  3. Step 3: Cross multiply
    161,428.80x = 241,989.60 × 125,870.40
  4. Step 4: Simplify right side
    161,428.80x = 30,459,327,747.84
  5. Step 5: Solve for x
    x = 30,459,327,747.84/161,428.80
  6. Step 6: Final answer
    x = 188,685.83

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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.