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Finding the Fourth Proportional to 205,746.40, 308,619.60 and 65,519.20

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Solution

The fourth proportional to 205,746.40, 308,619.60 and 65,519.20 is: 98,278.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,746.40 : 308,619.60 = 65,519.20 : x
  2. Step 2: Convert to fraction form
    205,746.40/308,619.60 = 65,519.20/x
  3. Step 3: Cross multiply
    205,746.40x = 308,619.60 × 65,519.20
  4. Step 4: Simplify right side
    205,746.40x = 20,220,509,296.32
  5. Step 5: Solve for x
    x = 20,220,509,296.32/205,746.40
  6. Step 6: Final answer
    x = 98,278.80

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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.