Home / 128,099.81-176,780.48-71,511.19

Finding the Fourth Proportional to 128,099.81, 176,780.48 and 71,511.19

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Solution

The fourth proportional to 128,099.81, 176,780.48 and 71,511.19 is: 98,686.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,099.81 : 176,780.48 = 71,511.19 : x
  2. Step 2: Convert to fraction form
    128,099.81/176,780.48 = 71,511.19/x
  3. Step 3: Cross multiply
    128,099.81x = 176,780.48 × 71,511.19
  4. Step 4: Simplify right side
    128,099.81x = 12,641,781,694.06
  5. Step 5: Solve for x
    x = 12,641,781,694.06/128,099.81
  6. Step 6: Final answer
    x = 98,686.96

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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.