Home / 78,015.09-117,034.79-25,412.34

Finding the Fourth Proportional to 78,015.09, 117,034.79 and 25,412.34

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Solution

The fourth proportional to 78,015.09, 117,034.79 and 25,412.34 is: 38,122.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.09 : 117,034.79 = 25,412.34 : x
  2. Step 2: Convert to fraction form
    78,015.09/117,034.79 = 25,412.34/x
  3. Step 3: Cross multiply
    78,015.09x = 117,034.79 × 25,412.34
  4. Step 4: Simplify right side
    78,015.09x = 2,974,127,748.25
  5. Step 5: Solve for x
    x = 2,974,127,748.25/78,015.09
  6. Step 6: Final answer
    x = 38,122.47

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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.