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Finding the Fourth Proportional to 113,511.90, 171,117.95 and 105,900.06

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Solution

The fourth proportional to 113,511.90, 171,117.95 and 105,900.06 is: 159,643.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,511.90 : 171,117.95 = 105,900.06 : x
  2. Step 2: Convert to fraction form
    113,511.90/171,117.95 = 105,900.06/x
  3. Step 3: Cross multiply
    113,511.90x = 171,117.95 × 105,900.06
  4. Step 4: Simplify right side
    113,511.90x = 18,121,400,642.58
  5. Step 5: Solve for x
    x = 18,121,400,642.58/113,511.90
  6. Step 6: Final answer
    x = 159,643.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.