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Finding the Fourth Proportional to 78,594.81, 108,428.79 and 48,371.01

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Solution

The fourth proportional to 78,594.81, 108,428.79 and 48,371.01 is: 66,732.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,594.81 : 108,428.79 = 48,371.01 : x
  2. Step 2: Convert to fraction form
    78,594.81/108,428.79 = 48,371.01/x
  3. Step 3: Cross multiply
    78,594.81x = 108,428.79 × 48,371.01
  4. Step 4: Simplify right side
    78,594.81x = 5,244,810,085.38
  5. Step 5: Solve for x
    x = 5,244,810,085.38/78,594.81
  6. Step 6: Final answer
    x = 66,732.27

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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.