Home / 128,036.40-192,054.60-80,689.20

Finding the Fourth Proportional to 128,036.40, 192,054.60 and 80,689.20

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Solution

The fourth proportional to 128,036.40, 192,054.60 and 80,689.20 is: 121,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,036.40 : 192,054.60 = 80,689.20 : x
  2. Step 2: Convert to fraction form
    128,036.40/192,054.60 = 80,689.20/x
  3. Step 3: Cross multiply
    128,036.40x = 192,054.60 × 80,689.20
  4. Step 4: Simplify right side
    128,036.40x = 15,496,732,030.32
  5. Step 5: Solve for x
    x = 15,496,732,030.32/128,036.40
  6. Step 6: Final answer
    x = 121,033.80

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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.