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Finding the Fourth Proportional to 134,172.40, 201,028.20 and 87,401.20

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Solution

The fourth proportional to 134,172.40, 201,028.20 and 87,401.20 is: 130,951.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,172.40 : 201,028.20 = 87,401.20 : x
  2. Step 2: Convert to fraction form
    134,172.40/201,028.20 = 87,401.20/x
  3. Step 3: Cross multiply
    134,172.40x = 201,028.20 × 87,401.20
  4. Step 4: Simplify right side
    134,172.40x = 17,570,105,913.84
  5. Step 5: Solve for x
    x = 17,570,105,913.84/134,172.40
  6. Step 6: Final answer
    x = 130,951.72

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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.