Home / 219,018.80-302,310.58-128,394.38

Finding the Fourth Proportional to 219,018.80, 302,310.58 and 128,394.38

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Solution

The fourth proportional to 219,018.80, 302,310.58 and 128,394.38 is: 177,222.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,018.80 : 302,310.58 = 128,394.38 : x
  2. Step 2: Convert to fraction form
    219,018.80/302,310.58 = 128,394.38/x
  3. Step 3: Cross multiply
    219,018.80x = 302,310.58 × 128,394.38
  4. Step 4: Simplify right side
    219,018.80x = 38,814,977,333.02
  5. Step 5: Solve for x
    x = 38,814,977,333.02/219,018.80
  6. Step 6: Final answer
    x = 177,222.13

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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.