Home / 79,285.92-109,415.03-42,987.63

Finding the Fourth Proportional to 79,285.92, 109,415.03 and 42,987.63

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Solution

The fourth proportional to 79,285.92, 109,415.03 and 42,987.63 is: 59,323.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,285.92 : 109,415.03 = 42,987.63 : x
  2. Step 2: Convert to fraction form
    79,285.92/109,415.03 = 42,987.63/x
  3. Step 3: Cross multiply
    79,285.92x = 109,415.03 × 42,987.63
  4. Step 4: Simplify right side
    79,285.92x = 4,703,493,021.45
  5. Step 5: Solve for x
    x = 4,703,493,021.45/79,285.92
  6. Step 6: Final answer
    x = 59,323.18

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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.