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Finding the Fourth Proportional to 64,886.81, 89,547.32 and 36,212.81

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Solution

The fourth proportional to 64,886.81, 89,547.32 and 36,212.81 is: 49,975.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,886.81 : 89,547.32 = 36,212.81 : x
  2. Step 2: Convert to fraction form
    64,886.81/89,547.32 = 36,212.81/x
  3. Step 3: Cross multiply
    64,886.81x = 89,547.32 × 36,212.81
  4. Step 4: Simplify right side
    64,886.81x = 3,242,759,727.96
  5. Step 5: Solve for x
    x = 3,242,759,727.96/64,886.81
  6. Step 6: Final answer
    x = 49,975.64

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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.