Home / 78,485.15-117,759.17-28,568.70

Finding the Fourth Proportional to 78,485.15, 117,759.17 and 28,568.70

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Solution

The fourth proportional to 78,485.15, 117,759.17 and 28,568.70 is: 42,864.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,485.15 : 117,759.17 = 28,568.70 : x
  2. Step 2: Convert to fraction form
    78,485.15/117,759.17 = 28,568.70/x
  3. Step 3: Cross multiply
    78,485.15x = 117,759.17 × 28,568.70
  4. Step 4: Simplify right side
    78,485.15x = 3,364,226,310.70
  5. Step 5: Solve for x
    x = 3,364,226,310.70/78,485.15
  6. Step 6: Final answer
    x = 42,864.49

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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.