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Finding the Fourth Proportional to 90,636.57, 135,957.56 and 43,256.68

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Solution

The fourth proportional to 90,636.57, 135,957.56 and 43,256.68 is: 64,886.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,636.57 : 135,957.56 = 43,256.68 : x
  2. Step 2: Convert to fraction form
    90,636.57/135,957.56 = 43,256.68/x
  3. Step 3: Cross multiply
    90,636.57x = 135,957.56 × 43,256.68
  4. Step 4: Simplify right side
    90,636.57x = 5,881,072,875.08
  5. Step 5: Solve for x
    x = 5,881,072,875.08/90,636.57
  6. Step 6: Final answer
    x = 64,886.31

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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.