Home / 78,629.40-117,944.10-61,111.80

Finding the Fourth Proportional to 78,629.40, 117,944.10 and 61,111.80

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Solution

The fourth proportional to 78,629.40, 117,944.10 and 61,111.80 is: 91,667.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,629.40 : 117,944.10 = 61,111.80 : x
  2. Step 2: Convert to fraction form
    78,629.40/117,944.10 = 61,111.80/x
  3. Step 3: Cross multiply
    78,629.40x = 117,944.10 × 61,111.80
  4. Step 4: Simplify right side
    78,629.40x = 7,207,776,250.38
  5. Step 5: Solve for x
    x = 7,207,776,250.38/78,629.40
  6. Step 6: Final answer
    x = 91,667.70

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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.