Home / 128,588.49-177,790.58-112,627.04

Finding the Fourth Proportional to 128,588.49, 177,790.58 and 112,627.04

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Solution

The fourth proportional to 128,588.49, 177,790.58 and 112,627.04 is: 155,721.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,588.49 : 177,790.58 = 112,627.04 : x
  2. Step 2: Convert to fraction form
    128,588.49/177,790.58 = 112,627.04/x
  3. Step 3: Cross multiply
    128,588.49x = 177,790.58 × 112,627.04
  4. Step 4: Simplify right side
    128,588.49x = 20,024,026,157.90
  5. Step 5: Solve for x
    x = 20,024,026,157.90/128,588.49
  6. Step 6: Final answer
    x = 155,721.76

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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.