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Finding the Fourth Proportional to 64,980.75, 89,673.72 and 35,172.75

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Solution

The fourth proportional to 64,980.75, 89,673.72 and 35,172.75 is: 48,538.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,980.75 : 89,673.72 = 35,172.75 : x
  2. Step 2: Convert to fraction form
    64,980.75/89,673.72 = 35,172.75/x
  3. Step 3: Cross multiply
    64,980.75x = 89,673.72 × 35,172.75
  4. Step 4: Simplify right side
    64,980.75x = 3,154,071,335.13
  5. Step 5: Solve for x
    x = 3,154,071,335.13/64,980.75
  6. Step 6: Final answer
    x = 48,538.55

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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.