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Finding the Fourth Proportional to 145,428.40, 218,142.60 and 145,428.40

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Solution

The fourth proportional to 145,428.40, 218,142.60 and 145,428.40 is: 218,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,428.40 : 218,142.60 = 145,428.40 : x
  2. Step 2: Convert to fraction form
    145,428.40/218,142.60 = 145,428.40/x
  3. Step 3: Cross multiply
    145,428.40x = 218,142.60 × 145,428.40
  4. Step 4: Simplify right side
    145,428.40x = 31,724,129,289.84
  5. Step 5: Solve for x
    x = 31,724,129,289.84/145,428.40
  6. Step 6: Final answer
    x = 218,142.60

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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.