Home / 128,103.40-192,155.10-118,772.20

Finding the Fourth Proportional to 128,103.40, 192,155.10 and 118,772.20

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Solution

The fourth proportional to 128,103.40, 192,155.10 and 118,772.20 is: 178,158.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,103.40 : 192,155.10 = 118,772.20 : x
  2. Step 2: Convert to fraction form
    128,103.40/192,155.10 = 118,772.20/x
  3. Step 3: Cross multiply
    128,103.40x = 192,155.10 × 118,772.20
  4. Step 4: Simplify right side
    128,103.40x = 22,822,683,968.22
  5. Step 5: Solve for x
    x = 22,822,683,968.22/128,103.40
  6. Step 6: Final answer
    x = 178,158.30

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1.5x scale

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.