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Finding the Fourth Proportional to 186,312.09, 257,103.04 and 105,738.15

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Solution

The fourth proportional to 186,312.09, 257,103.04 and 105,738.15 is: 145,914.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,312.09 : 257,103.04 = 105,738.15 : x
  2. Step 2: Convert to fraction form
    186,312.09/257,103.04 = 105,738.15/x
  3. Step 3: Cross multiply
    186,312.09x = 257,103.04 × 105,738.15
  4. Step 4: Simplify right side
    186,312.09x = 27,185,599,808.98
  5. Step 5: Solve for x
    x = 27,185,599,808.98/186,312.09
  6. Step 6: Final answer
    x = 145,914.31

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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.