Home / 77,051.36-115,581-21,651.68

Finding the Fourth Proportional to 77,051.36, 115,581 and 21,651.68

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Solution

The fourth proportional to 77,051.36, 115,581 and 21,651.68 is: 32,478.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,051.36 : 115,581 = 21,651.68 : x
  2. Step 2: Convert to fraction form
    77,051.36/115,581 = 21,651.68/x
  3. Step 3: Cross multiply
    77,051.36x = 115,581 × 21,651.68
  4. Step 4: Simplify right side
    77,051.36x = 2,502,522,826.08
  5. Step 5: Solve for x
    x = 2,502,522,826.08/77,051.36
  6. Step 6: Final answer
    x = 32,478.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.