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Finding the Fourth Proportional to 78,875.84, 118,315.60 and 26,289.60

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Solution

The fourth proportional to 78,875.84, 118,315.60 and 26,289.60 is: 39,435.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,875.84 : 118,315.60 = 26,289.60 : x
  2. Step 2: Convert to fraction form
    78,875.84/118,315.60 = 26,289.60/x
  3. Step 3: Cross multiply
    78,875.84x = 118,315.60 × 26,289.60
  4. Step 4: Simplify right side
    78,875.84x = 3,110,469,797.76
  5. Step 5: Solve for x
    x = 3,110,469,797.76/78,875.84
  6. Step 6: Final answer
    x = 39,435.01

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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.