Home / 78,717.32-108,628.50-42,907.64

Finding the Fourth Proportional to 78,717.32, 108,628.50 and 42,907.64

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Solution

The fourth proportional to 78,717.32, 108,628.50 and 42,907.64 is: 59,211.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,717.32 : 108,628.50 = 42,907.64 : x
  2. Step 2: Convert to fraction form
    78,717.32/108,628.50 = 42,907.64/x
  3. Step 3: Cross multiply
    78,717.32x = 108,628.50 × 42,907.64
  4. Step 4: Simplify right side
    78,717.32x = 4,660,992,571.74
  5. Step 5: Solve for x
    x = 4,660,992,571.74/78,717.32
  6. Step 6: Final answer
    x = 59,211.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.