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Finding the Fourth Proportional to 78,886.81, 118,373.27 and 45,671.75

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Solution

The fourth proportional to 78,886.81, 118,373.27 and 45,671.75 is: 68,532.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,886.81 : 118,373.27 = 45,671.75 : x
  2. Step 2: Convert to fraction form
    78,886.81/118,373.27 = 45,671.75/x
  3. Step 3: Cross multiply
    78,886.81x = 118,373.27 × 45,671.75
  4. Step 4: Simplify right side
    78,886.81x = 5,406,313,802.26
  5. Step 5: Solve for x
    x = 5,406,313,802.26/78,886.81
  6. Step 6: Final answer
    x = 68,532.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.