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Finding the Fourth Proportional to 109,931.20, 164,767.20 and 46,751.20

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Solution

The fourth proportional to 109,931.20, 164,767.20 and 46,751.20 is: 70,071.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,931.20 : 164,767.20 = 46,751.20 : x
  2. Step 2: Convert to fraction form
    109,931.20/164,767.20 = 46,751.20/x
  3. Step 3: Cross multiply
    109,931.20x = 164,767.20 × 46,751.20
  4. Step 4: Simplify right side
    109,931.20x = 7,703,064,320.64
  5. Step 5: Solve for x
    x = 7,703,064,320.64/109,931.20
  6. Step 6: Final answer
    x = 70,071.68

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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.