Home / 128,362.40-192,576.04-103,627.20

Finding the Fourth Proportional to 128,362.40, 192,576.04 and 103,627.20

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Solution

The fourth proportional to 128,362.40, 192,576.04 and 103,627.20 is: 155,466.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,362.40 : 192,576.04 = 103,627.20 : x
  2. Step 2: Convert to fraction form
    128,362.40/192,576.04 = 103,627.20/x
  3. Step 3: Cross multiply
    128,362.40x = 192,576.04 × 103,627.20
  4. Step 4: Simplify right side
    128,362.40x = 19,956,115,812.29
  5. Step 5: Solve for x
    x = 19,956,115,812.29/128,362.40
  6. Step 6: Final answer
    x = 155,466.99

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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.