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Finding the Fourth Proportional to 77,989, 116,995.66 and 25,386.04

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Solution

The fourth proportional to 77,989, 116,995.66 and 25,386.04 is: 38,083.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,989 : 116,995.66 = 25,386.04 : x
  2. Step 2: Convert to fraction form
    77,989/116,995.66 = 25,386.04/x
  3. Step 3: Cross multiply
    77,989x = 116,995.66 × 25,386.04
  4. Step 4: Simplify right side
    77,989x = 2,970,056,504.59
  5. Step 5: Solve for x
    x = 2,970,056,504.59/77,989
  6. Step 6: Final answer
    x = 38,083.02

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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.