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Finding the Fourth Proportional to 208,012.40, 311,903.40 and 89,663.60

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Solution

The fourth proportional to 208,012.40, 311,903.40 and 89,663.60 is: 134,445.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,012.40 : 311,903.40 = 89,663.60 : x
  2. Step 2: Convert to fraction form
    208,012.40/311,903.40 = 89,663.60/x
  3. Step 3: Cross multiply
    208,012.40x = 311,903.40 × 89,663.60
  4. Step 4: Simplify right side
    208,012.40x = 27,966,381,696.24
  5. Step 5: Solve for x
    x = 27,966,381,696.24/208,012.40
  6. Step 6: Final answer
    x = 134,445.74

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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.