Home / 128,440.72-192,661.36-69,304.24

Finding the Fourth Proportional to 128,440.72, 192,661.36 and 69,304.24

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Solution

The fourth proportional to 128,440.72, 192,661.36 and 69,304.24 is: 103,956.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,440.72 : 192,661.36 = 69,304.24 : x
  2. Step 2: Convert to fraction form
    128,440.72/192,661.36 = 69,304.24/x
  3. Step 3: Cross multiply
    128,440.72x = 192,661.36 × 69,304.24
  4. Step 4: Simplify right side
    128,440.72x = 13,352,249,132.17
  5. Step 5: Solve for x
    x = 13,352,249,132.17/128,440.72
  6. Step 6: Final answer
    x = 103,956.51

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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.