Home / 219,010.07-302,206.43-128,345.28

Finding the Fourth Proportional to 219,010.07, 302,206.43 and 128,345.28

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Solution

The fourth proportional to 219,010.07, 302,206.43 and 128,345.28 is: 177,100.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,010.07 : 302,206.43 = 128,345.28 : x
  2. Step 2: Convert to fraction form
    219,010.07/302,206.43 = 128,345.28/x
  3. Step 3: Cross multiply
    219,010.07x = 302,206.43 × 128,345.28
  4. Step 4: Simplify right side
    219,010.07x = 38,786,768,234.42
  5. Step 5: Solve for x
    x = 38,786,768,234.42/219,010.07
  6. Step 6: Final answer
    x = 177,100.39

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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.