Home / 128,587.74-177,789.54-112,626.29

Finding the Fourth Proportional to 128,587.74, 177,789.54 and 112,626.29

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Solution

The fourth proportional to 128,587.74, 177,789.54 and 112,626.29 is: 155,720.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,587.74 : 177,789.54 = 112,626.29 : x
  2. Step 2: Convert to fraction form
    128,587.74/177,789.54 = 112,626.29/x
  3. Step 3: Cross multiply
    128,587.74x = 177,789.54 × 112,626.29
  4. Step 4: Simplify right side
    128,587.74x = 20,023,776,157.76
  5. Step 5: Solve for x
    x = 20,023,776,157.76/128,587.74
  6. Step 6: Final answer
    x = 155,720.72

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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.