Home / 77,639.56-107,112.18-47,779.72

Finding the Fourth Proportional to 77,639.56, 107,112.18 and 47,779.72

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Solution

The fourth proportional to 77,639.56, 107,112.18 and 47,779.72 is: 65,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,639.56 : 107,112.18 = 47,779.72 : x
  2. Step 2: Convert to fraction form
    77,639.56/107,112.18 = 47,779.72/x
  3. Step 3: Cross multiply
    77,639.56x = 107,112.18 × 47,779.72
  4. Step 4: Simplify right side
    77,639.56x = 5,117,789,968.99
  5. Step 5: Solve for x
    x = 5,117,789,968.99/77,639.56
  6. Step 6: Final answer
    x = 65,917.30

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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.