Home / 128,584.60-177,441.64-71,994.76

Finding the Fourth Proportional to 128,584.60, 177,441.64 and 71,994.76

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Solution

The fourth proportional to 128,584.60, 177,441.64 and 71,994.76 is: 99,349.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,584.60 : 177,441.64 = 71,994.76 : x
  2. Step 2: Convert to fraction form
    128,584.60/177,441.64 = 71,994.76/x
  3. Step 3: Cross multiply
    128,584.60x = 177,441.64 × 71,994.76
  4. Step 4: Simplify right side
    128,584.60x = 12,774,868,285.81
  5. Step 5: Solve for x
    x = 12,774,868,285.81/128,584.60
  6. Step 6: Final answer
    x = 99,349.91

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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.