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Finding the Fourth Proportional to 133,012.61, 183,551.69 and 72,581.75

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Solution

The fourth proportional to 133,012.61, 183,551.69 and 72,581.75 is: 100,159.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,012.61 : 183,551.69 = 72,581.75 : x
  2. Step 2: Convert to fraction form
    133,012.61/183,551.69 = 72,581.75/x
  3. Step 3: Cross multiply
    133,012.61x = 183,551.69 × 72,581.75
  4. Step 4: Simplify right side
    133,012.61x = 13,322,502,875.66
  5. Step 5: Solve for x
    x = 13,322,502,875.66/133,012.61
  6. Step 6: Final answer
    x = 100,159.70

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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.