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Finding the Fourth Proportional to 219,265.89, 328,763.51 and 86,085.79

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Solution

The fourth proportional to 219,265.89, 328,763.51 and 86,085.79 is: 129,075.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,265.89 : 328,763.51 = 86,085.79 : x
  2. Step 2: Convert to fraction form
    219,265.89/328,763.51 = 86,085.79/x
  3. Step 3: Cross multiply
    219,265.89x = 328,763.51 × 86,085.79
  4. Step 4: Simplify right side
    219,265.89x = 28,301,865,552.01
  5. Step 5: Solve for x
    x = 28,301,865,552.01/219,265.89
  6. Step 6: Final answer
    x = 129,075.55

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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.