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Finding the Fourth Proportional to 113,699.76, 170,491.32 and 66,329.88

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Solution

The fourth proportional to 113,699.76, 170,491.32 and 66,329.88 is: 99,460.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,699.76 : 170,491.32 = 66,329.88 : x
  2. Step 2: Convert to fraction form
    113,699.76/170,491.32 = 66,329.88/x
  3. Step 3: Cross multiply
    113,699.76x = 170,491.32 × 66,329.88
  4. Step 4: Simplify right side
    113,699.76x = 11,308,668,796.64
  5. Step 5: Solve for x
    x = 11,308,668,796.64/113,699.76
  6. Step 6: Final answer
    x = 99,460.80

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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.