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Finding the Fourth Proportional to 98,699.40, 147,830.40 and 76,440.60

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Solution

The fourth proportional to 98,699.40, 147,830.40 and 76,440.60 is: 114,491.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,699.40 : 147,830.40 = 76,440.60 : x
  2. Step 2: Convert to fraction form
    98,699.40/147,830.40 = 76,440.60/x
  3. Step 3: Cross multiply
    98,699.40x = 147,830.40 × 76,440.60
  4. Step 4: Simplify right side
    98,699.40x = 11,300,244,474.24
  5. Step 5: Solve for x
    x = 11,300,244,474.24/98,699.40
  6. Step 6: Final answer
    x = 114,491.52

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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.