Home / 219,501.29-302,905.56-128,855.81

Finding the Fourth Proportional to 219,501.29, 302,905.56 and 128,855.81

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Solution

The fourth proportional to 219,501.29, 302,905.56 and 128,855.81 is: 177,817.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,501.29 : 302,905.56 = 128,855.81 : x
  2. Step 2: Convert to fraction form
    219,501.29/302,905.56 = 128,855.81/x
  3. Step 3: Cross multiply
    219,501.29x = 302,905.56 × 128,855.81
  4. Step 4: Simplify right side
    219,501.29x = 39,031,139,772.78
  5. Step 5: Solve for x
    x = 39,031,139,772.78/219,501.29
  6. Step 6: Final answer
    x = 177,817.36

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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.