Home / 78,015.70-107,661.57-42,205.63

Finding the Fourth Proportional to 78,015.70, 107,661.57 and 42,205.63

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Solution

The fourth proportional to 78,015.70, 107,661.57 and 42,205.63 is: 58,243.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.70 : 107,661.57 = 42,205.63 : x
  2. Step 2: Convert to fraction form
    78,015.70/107,661.57 = 42,205.63/x
  3. Step 3: Cross multiply
    78,015.70x = 107,661.57 × 42,205.63
  4. Step 4: Simplify right side
    78,015.70x = 4,543,924,388.64
  5. Step 5: Solve for x
    x = 4,543,924,388.64/78,015.70
  6. Step 6: Final answer
    x = 58,243.72

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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.