Home / 128,455.20-192,423.60-89,056.80

Finding the Fourth Proportional to 128,455.20, 192,423.60 and 89,056.80

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Solution

The fourth proportional to 128,455.20, 192,423.60 and 89,056.80 is: 133,405.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,455.20 : 192,423.60 = 89,056.80 : x
  2. Step 2: Convert to fraction form
    128,455.20/192,423.60 = 89,056.80/x
  3. Step 3: Cross multiply
    128,455.20x = 192,423.60 × 89,056.80
  4. Step 4: Simplify right side
    128,455.20x = 17,136,630,060.48
  5. Step 5: Solve for x
    x = 17,136,630,060.48/128,455.20
  6. Step 6: Final answer
    x = 133,405.50

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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.