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Finding the Fourth Proportional to 272,696.30, 409,127.81 and 139,670.67

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Solution

The fourth proportional to 272,696.30, 409,127.81 and 139,670.67 is: 209,548.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,696.30 : 409,127.81 = 139,670.67 : x
  2. Step 2: Convert to fraction form
    272,696.30/409,127.81 = 139,670.67/x
  3. Step 3: Cross multiply
    272,696.30x = 409,127.81 × 139,670.67
  4. Step 4: Simplify right side
    272,696.30x = 57,143,154,639.98
  5. Step 5: Solve for x
    x = 57,143,154,639.98/272,696.30
  6. Step 6: Final answer
    x = 209,548.70

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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.