Home / 128,826.40-193,239.60-118,688.80

Finding the Fourth Proportional to 128,826.40, 193,239.60 and 118,688.80

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Solution

The fourth proportional to 128,826.40, 193,239.60 and 118,688.80 is: 178,033.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,826.40 : 193,239.60 = 118,688.80 : x
  2. Step 2: Convert to fraction form
    128,826.40/193,239.60 = 118,688.80/x
  3. Step 3: Cross multiply
    128,826.40x = 193,239.60 × 118,688.80
  4. Step 4: Simplify right side
    128,826.40x = 22,935,376,236.48
  5. Step 5: Solve for x
    x = 22,935,376,236.48/128,826.40
  6. Step 6: Final answer
    x = 178,033.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.