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Finding the Fourth Proportional to 98,981.60, 148,180.80 and 65,739.20

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Solution

The fourth proportional to 98,981.60, 148,180.80 and 65,739.20 is: 98,415.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,981.60 : 148,180.80 = 65,739.20 : x
  2. Step 2: Convert to fraction form
    98,981.60/148,180.80 = 65,739.20/x
  3. Step 3: Cross multiply
    98,981.60x = 148,180.80 × 65,739.20
  4. Step 4: Simplify right side
    98,981.60x = 9,741,287,247.36
  5. Step 5: Solve for x
    x = 9,741,287,247.36/98,981.60
  6. Step 6: Final answer
    x = 98,415.13

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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.