Home / 78,015.12-117,037.28-31,271.68

Finding the Fourth Proportional to 78,015.12, 117,037.28 and 31,271.68

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Solution

The fourth proportional to 78,015.12, 117,037.28 and 31,271.68 is: 46,913.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.12 : 117,037.28 = 31,271.68 : x
  2. Step 2: Convert to fraction form
    78,015.12/117,037.28 = 31,271.68/x
  3. Step 3: Cross multiply
    78,015.12x = 117,037.28 × 31,271.68
  4. Step 4: Simplify right side
    78,015.12x = 3,659,952,368.23
  5. Step 5: Solve for x
    x = 3,659,952,368.23/78,015.12
  6. Step 6: Final answer
    x = 46,913.37

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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.