Home / 128,588.18-177,790.15-112,626.72

Finding the Fourth Proportional to 128,588.18, 177,790.15 and 112,626.72

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Solution

The fourth proportional to 128,588.18, 177,790.15 and 112,626.72 is: 155,721.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,588.18 : 177,790.15 = 112,626.72 : x
  2. Step 2: Convert to fraction form
    128,588.18/177,790.15 = 112,626.72/x
  3. Step 3: Cross multiply
    128,588.18x = 177,790.15 × 112,626.72
  4. Step 4: Simplify right side
    128,588.18x = 20,023,921,442.81
  5. Step 5: Solve for x
    x = 20,023,921,442.81/128,588.18
  6. Step 6: Final answer
    x = 155,721.32

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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.