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Finding the Fourth Proportional to 98,458.40, 147,687.60 and 51,219.20

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Solution

The fourth proportional to 98,458.40, 147,687.60 and 51,219.20 is: 76,828.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,458.40 : 147,687.60 = 51,219.20 : x
  2. Step 2: Convert to fraction form
    98,458.40/147,687.60 = 51,219.20/x
  3. Step 3: Cross multiply
    98,458.40x = 147,687.60 × 51,219.20
  4. Step 4: Simplify right side
    98,458.40x = 7,564,440,721.92
  5. Step 5: Solve for x
    x = 7,564,440,721.92/98,458.40
  6. Step 6: Final answer
    x = 76,828.80

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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.