Home / 128,720.20-193,080.30-117,315.40

Finding the Fourth Proportional to 128,720.20, 193,080.30 and 117,315.40

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Solution

The fourth proportional to 128,720.20, 193,080.30 and 117,315.40 is: 175,973.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,720.20 : 193,080.30 = 117,315.40 : x
  2. Step 2: Convert to fraction form
    128,720.20/193,080.30 = 117,315.40/x
  3. Step 3: Cross multiply
    128,720.20x = 193,080.30 × 117,315.40
  4. Step 4: Simplify right side
    128,720.20x = 22,651,292,626.62
  5. Step 5: Solve for x
    x = 22,651,292,626.62/128,720.20
  6. Step 6: Final answer
    x = 175,973.10

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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.