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Finding the Fourth Proportional to 219,315.70, 328,973.55 and 86,151.70

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Solution

The fourth proportional to 219,315.70, 328,973.55 and 86,151.70 is: 129,227.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,315.70 : 328,973.55 = 86,151.70 : x
  2. Step 2: Convert to fraction form
    219,315.70/328,973.55 = 86,151.70/x
  3. Step 3: Cross multiply
    219,315.70x = 328,973.55 × 86,151.70
  4. Step 4: Simplify right side
    219,315.70x = 28,341,630,587.54
  5. Step 5: Solve for x
    x = 28,341,630,587.54/219,315.70
  6. Step 6: Final answer
    x = 129,227.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.