Home / 78,311.28-117,520.32-31,567.68

Finding the Fourth Proportional to 78,311.28, 117,520.32 and 31,567.68

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Solution

The fourth proportional to 78,311.28, 117,520.32 and 31,567.68 is: 47,373.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,311.28 : 117,520.32 = 31,567.68 : x
  2. Step 2: Convert to fraction form
    78,311.28/117,520.32 = 31,567.68/x
  3. Step 3: Cross multiply
    78,311.28x = 117,520.32 × 31,567.68
  4. Step 4: Simplify right side
    78,311.28x = 3,709,843,855.26
  5. Step 5: Solve for x
    x = 3,709,843,855.26/78,311.28
  6. Step 6: Final answer
    x = 47,373.05

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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.