Home / 128,225.20-176,946.72-90,040.24

Finding the Fourth Proportional to 128,225.20, 176,946.72 and 90,040.24

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Solution

The fourth proportional to 128,225.20, 176,946.72 and 90,040.24 is: 124,252.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,225.20 : 176,946.72 = 90,040.24 : x
  2. Step 2: Convert to fraction form
    128,225.20/176,946.72 = 90,040.24/x
  3. Step 3: Cross multiply
    128,225.20x = 176,946.72 × 90,040.24
  4. Step 4: Simplify right side
    128,225.20x = 15,932,325,136.01
  5. Step 5: Solve for x
    x = 15,932,325,136.01/128,225.20
  6. Step 6: Final answer
    x = 124,252.68

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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.