Home / 78,345.28-117,530.88-38,903.68

Finding the Fourth Proportional to 78,345.28, 117,530.88 and 38,903.68

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Solution

The fourth proportional to 78,345.28, 117,530.88 and 38,903.68 is: 58,361.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,345.28 : 117,530.88 = 38,903.68 : x
  2. Step 2: Convert to fraction form
    78,345.28/117,530.88 = 38,903.68/x
  3. Step 3: Cross multiply
    78,345.28x = 117,530.88 × 38,903.68
  4. Step 4: Simplify right side
    78,345.28x = 4,572,383,745.64
  5. Step 5: Solve for x
    x = 4,572,383,745.64/78,345.28
  6. Step 6: Final answer
    x = 58,361.96

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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.