Home / 128,304.20-192,487.59-90,427.29

Finding the Fourth Proportional to 128,304.20, 192,487.59 and 90,427.29

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Solution

The fourth proportional to 128,304.20, 192,487.59 and 90,427.29 is: 135,662.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304.20 : 192,487.59 = 90,427.29 : x
  2. Step 2: Convert to fraction form
    128,304.20/192,487.59 = 90,427.29/x
  3. Step 3: Cross multiply
    128,304.20x = 192,487.59 × 90,427.29
  4. Step 4: Simplify right side
    128,304.20x = 17,406,130,400.50
  5. Step 5: Solve for x
    x = 17,406,130,400.50/128,304.20
  6. Step 6: Final answer
    x = 135,662.98

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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.