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Finding the Fourth Proportional to 78,528.60, 108,409.60 and 60,583.32

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Solution

The fourth proportional to 78,528.60, 108,409.60 and 60,583.32 is: 83,635.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,528.60 : 108,409.60 = 60,583.32 : x
  2. Step 2: Convert to fraction form
    78,528.60/108,409.60 = 60,583.32/x
  3. Step 3: Cross multiply
    78,528.60x = 108,409.60 × 60,583.32
  4. Step 4: Simplify right side
    78,528.60x = 6,567,812,816.28
  5. Step 5: Solve for x
    x = 6,567,812,816.28/78,528.60
  6. Step 6: Final answer
    x = 83,635.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.