Home / 77,947.58-107,567-42,137.28

Finding the Fourth Proportional to 77,947.58, 107,567 and 42,137.28

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Solution

The fourth proportional to 77,947.58, 107,567 and 42,137.28 is: 58,149.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,947.58 : 107,567 = 42,137.28 : x
  2. Step 2: Convert to fraction form
    77,947.58/107,567 = 42,137.28/x
  3. Step 3: Cross multiply
    77,947.58x = 107,567 × 42,137.28
  4. Step 4: Simplify right side
    77,947.58x = 4,532,580,797.76
  5. Step 5: Solve for x
    x = 4,532,580,797.76/77,947.58
  6. Step 6: Final answer
    x = 58,149.09

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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.