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Finding the Fourth Proportional to 111,569.90, 154,026.51 and 86,020.21

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Solution

The fourth proportional to 111,569.90, 154,026.51 and 86,020.21 is: 118,754.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,569.90 : 154,026.51 = 86,020.21 : x
  2. Step 2: Convert to fraction form
    111,569.90/154,026.51 = 86,020.21/x
  3. Step 3: Cross multiply
    111,569.90x = 154,026.51 × 86,020.21
  4. Step 4: Simplify right side
    111,569.90x = 13,249,391,965.63
  5. Step 5: Solve for x
    x = 13,249,391,965.63/111,569.90
  6. Step 6: Final answer
    x = 118,754.18

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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.