Home / 219,008.57-302,204.36-128,343.78

Finding the Fourth Proportional to 219,008.57, 302,204.36 and 128,343.78

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Solution

The fourth proportional to 219,008.57, 302,204.36 and 128,343.78 is: 177,098.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,008.57 : 302,204.36 = 128,343.78 : x
  2. Step 2: Convert to fraction form
    219,008.57/302,204.36 = 128,343.78/x
  3. Step 3: Cross multiply
    219,008.57x = 302,204.36 × 128,343.78
  4. Step 4: Simplify right side
    219,008.57x = 38,786,049,253.16
  5. Step 5: Solve for x
    x = 38,786,049,253.16/219,008.57
  6. Step 6: Final answer
    x = 177,098.32

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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.