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Finding the Fourth Proportional to 145,429.40, 218,144.10 and 145,429.40

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Solution

The fourth proportional to 145,429.40, 218,144.10 and 145,429.40 is: 218,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,429.40 : 218,144.10 = 145,429.40 : x
  2. Step 2: Convert to fraction form
    145,429.40/218,144.10 = 145,429.40/x
  3. Step 3: Cross multiply
    145,429.40x = 218,144.10 × 145,429.40
  4. Step 4: Simplify right side
    145,429.40x = 31,724,565,576.54
  5. Step 5: Solve for x
    x = 31,724,565,576.54/145,429.40
  6. Step 6: Final answer
    x = 218,144.10

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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.