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Finding the Fourth Proportional to 64,940.40, 89,659.44 and 53,032.32

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Solution

The fourth proportional to 64,940.40, 89,659.44 and 53,032.32 is: 73,218.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,940.40 : 89,659.44 = 53,032.32 : x
  2. Step 2: Convert to fraction form
    64,940.40/89,659.44 = 53,032.32/x
  3. Step 3: Cross multiply
    64,940.40x = 89,659.44 × 53,032.32
  4. Step 4: Simplify right side
    64,940.40x = 4,754,848,113.10
  5. Step 5: Solve for x
    x = 4,754,848,113.10/64,940.40
  6. Step 6: Final answer
    x = 73,218.65

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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.