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Finding the Fourth Proportional to 111,154.16, 153,371.64 and 65,820.08

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Solution

The fourth proportional to 111,154.16, 153,371.64 and 65,820.08 is: 90,819.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,154.16 : 153,371.64 = 65,820.08 : x
  2. Step 2: Convert to fraction form
    111,154.16/153,371.64 = 65,820.08/x
  3. Step 3: Cross multiply
    111,154.16x = 153,371.64 × 65,820.08
  4. Step 4: Simplify right side
    111,154.16x = 10,094,933,614.53
  5. Step 5: Solve for x
    x = 10,094,933,614.53/111,154.16
  6. Step 6: Final answer
    x = 90,819.22

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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.