Home / 128,128.73-176,828.58-71,551.04

Finding the Fourth Proportional to 128,128.73, 176,828.58 and 71,551.04

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Solution

The fourth proportional to 128,128.73, 176,828.58 and 71,551.04 is: 98,746.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,128.73 : 176,828.58 = 71,551.04 : x
  2. Step 2: Convert to fraction form
    128,128.73/176,828.58 = 71,551.04/x
  3. Step 3: Cross multiply
    128,128.73x = 176,828.58 × 71,551.04
  4. Step 4: Simplify right side
    128,128.73x = 12,652,268,800.72
  5. Step 5: Solve for x
    x = 12,652,268,800.72/128,128.73
  6. Step 6: Final answer
    x = 98,746.54

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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.