Home / 112,840.20-169,038.36-81,175.18

Finding the Fourth Proportional to 112,840.20, 169,038.36 and 81,175.18

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Solution

The fourth proportional to 112,840.20, 169,038.36 and 81,175.18 is: 121,603.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,840.20 : 169,038.36 = 81,175.18 : x
  2. Step 2: Convert to fraction form
    112,840.20/169,038.36 = 81,175.18/x
  3. Step 3: Cross multiply
    112,840.20x = 169,038.36 × 81,175.18
  4. Step 4: Simplify right side
    112,840.20x = 13,721,718,138.67
  5. Step 5: Solve for x
    x = 13,721,718,138.67/112,840.20
  6. Step 6: Final answer
    x = 121,603.10

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1.5x scale

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.