Home / 219,419.55-302,783.27-128,779.20

Finding the Fourth Proportional to 219,419.55, 302,783.27 and 128,779.20

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Solution

The fourth proportional to 219,419.55, 302,783.27 and 128,779.20 is: 177,706.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,419.55 : 302,783.27 = 128,779.20 : x
  2. Step 2: Convert to fraction form
    219,419.55/302,783.27 = 128,779.20/x
  3. Step 3: Cross multiply
    219,419.55x = 302,783.27 × 128,779.20
  4. Step 4: Simplify right side
    219,419.55x = 38,992,186,640.09
  5. Step 5: Solve for x
    x = 38,992,186,640.09/219,419.55
  6. Step 6: Final answer
    x = 177,706.07

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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.