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Finding the Fourth Proportional to 238,721.78, 358,106.04 and 86,960.10

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Solution

The fourth proportional to 238,721.78, 358,106.04 and 86,960.10 is: 130,448.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,721.78 : 358,106.04 = 86,960.10 : x
  2. Step 2: Convert to fraction form
    238,721.78/358,106.04 = 86,960.10/x
  3. Step 3: Cross multiply
    238,721.78x = 358,106.04 × 86,960.10
  4. Step 4: Simplify right side
    238,721.78x = 31,140,937,049.00
  5. Step 5: Solve for x
    x = 31,140,937,049.00/238,721.78
  6. Step 6: Final answer
    x = 130,448.67

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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.