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Finding the Fourth Proportional to 78,870.60, 118,324.73 and 26,280.54

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Solution

The fourth proportional to 78,870.60, 118,324.73 and 26,280.54 is: 39,427.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,870.60 : 118,324.73 = 26,280.54 : x
  2. Step 2: Convert to fraction form
    78,870.60/118,324.73 = 26,280.54/x
  3. Step 3: Cross multiply
    78,870.60x = 118,324.73 × 26,280.54
  4. Step 4: Simplify right side
    78,870.60x = 3,109,637,865.46
  5. Step 5: Solve for x
    x = 3,109,637,865.46/78,870.60
  6. Step 6: Final answer
    x = 39,427.09

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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.