Home / 78,239.78-117,381.54-25,686.18

Finding the Fourth Proportional to 78,239.78, 117,381.54 and 25,686.18

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Solution

The fourth proportional to 78,239.78, 117,381.54 and 25,686.18 is: 38,536.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,239.78 : 117,381.54 = 25,686.18 : x
  2. Step 2: Convert to fraction form
    78,239.78/117,381.54 = 25,686.18/x
  3. Step 3: Cross multiply
    78,239.78x = 117,381.54 × 25,686.18
  4. Step 4: Simplify right side
    78,239.78x = 3,015,083,365.12
  5. Step 5: Solve for x
    x = 3,015,083,365.12/78,239.78
  6. Step 6: Final answer
    x = 38,536.45

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1.5x scale

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.