Home / 112,643.10-155,512.17-84,120.03

Finding the Fourth Proportional to 112,643.10, 155,512.17 and 84,120.03

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Solution

The fourth proportional to 112,643.10, 155,512.17 and 84,120.03 is: 116,133.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,643.10 : 155,512.17 = 84,120.03 : x
  2. Step 2: Convert to fraction form
    112,643.10/155,512.17 = 84,120.03/x
  3. Step 3: Cross multiply
    112,643.10x = 155,512.17 × 84,120.03
  4. Step 4: Simplify right side
    112,643.10x = 13,081,688,405.77
  5. Step 5: Solve for x
    x = 13,081,688,405.77/112,643.10
  6. Step 6: Final answer
    x = 116,133.95

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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.