Home / 219,619.86-302,974.80-128,974.20

Finding the Fourth Proportional to 219,619.86, 302,974.80 and 128,974.20

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Solution

The fourth proportional to 219,619.86, 302,974.80 and 128,974.20 is: 177,925.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,619.86 : 302,974.80 = 128,974.20 : x
  2. Step 2: Convert to fraction form
    219,619.86/302,974.80 = 128,974.20/x
  3. Step 3: Cross multiply
    219,619.86x = 302,974.80 × 128,974.20
  4. Step 4: Simplify right side
    219,619.86x = 39,075,932,450.16
  5. Step 5: Solve for x
    x = 39,075,932,450.16/219,619.86
  6. Step 6: Final answer
    x = 177,925.31

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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.