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Finding the Fourth Proportional to 64,720.56, 89,317.56 and 36,429.36

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Solution

The fourth proportional to 64,720.56, 89,317.56 and 36,429.36 is: 50,274.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,720.56 : 89,317.56 = 36,429.36 : x
  2. Step 2: Convert to fraction form
    64,720.56/89,317.56 = 36,429.36/x
  3. Step 3: Cross multiply
    64,720.56x = 89,317.56 × 36,429.36
  4. Step 4: Simplify right side
    64,720.56x = 3,253,781,547.56
  5. Step 5: Solve for x
    x = 3,253,781,547.56/64,720.56
  6. Step 6: Final answer
    x = 50,274.31

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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.