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Finding the Fourth Proportional to 89,930.70, 134,809.65 and 69,929.10

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Solution

The fourth proportional to 89,930.70, 134,809.65 and 69,929.10 is: 104,826.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,930.70 : 134,809.65 = 69,929.10 : x
  2. Step 2: Convert to fraction form
    89,930.70/134,809.65 = 69,929.10/x
  3. Step 3: Cross multiply
    89,930.70x = 134,809.65 × 69,929.10
  4. Step 4: Simplify right side
    89,930.70x = 9,427,117,495.82
  5. Step 5: Solve for x
    x = 9,427,117,495.82/89,930.70
  6. Step 6: Final answer
    x = 104,826.47

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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.