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Finding the Fourth Proportional to 157,907.64, 217,913.28 and 86,288.88

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Solution

The fourth proportional to 157,907.64, 217,913.28 and 86,288.88 is: 119,079.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,907.64 : 217,913.28 = 86,288.88 : x
  2. Step 2: Convert to fraction form
    157,907.64/217,913.28 = 86,288.88/x
  3. Step 3: Cross multiply
    157,907.64x = 217,913.28 × 86,288.88
  4. Step 4: Simplify right side
    157,907.64x = 18,803,492,868.33
  5. Step 5: Solve for x
    x = 18,803,492,868.33/157,907.64
  6. Step 6: Final answer
    x = 119,079.06

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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.