Home / 77,999.56-107,639.08-42,189.66

Finding the Fourth Proportional to 77,999.56, 107,639.08 and 42,189.66

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Solution

The fourth proportional to 77,999.56, 107,639.08 and 42,189.66 is: 58,221.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,999.56 : 107,639.08 = 42,189.66 : x
  2. Step 2: Convert to fraction form
    77,999.56/107,639.08 = 42,189.66/x
  3. Step 3: Cross multiply
    77,999.56x = 107,639.08 × 42,189.66
  4. Step 4: Simplify right side
    77,999.56x = 4,541,256,082.44
  5. Step 5: Solve for x
    x = 4,541,256,082.44/77,999.56
  6. Step 6: Final answer
    x = 58,221.56

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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.