Home / 128,242.20-176,983.39-70,880.28

Finding the Fourth Proportional to 128,242.20, 176,983.39 and 70,880.28

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Solution

The fourth proportional to 128,242.20, 176,983.39 and 70,880.28 is: 97,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,242.20 : 176,983.39 = 70,880.28 : x
  2. Step 2: Convert to fraction form
    128,242.20/176,983.39 = 70,880.28/x
  3. Step 3: Cross multiply
    128,242.20x = 176,983.39 × 70,880.28
  4. Step 4: Simplify right side
    128,242.20x = 12,544,632,238.55
  5. Step 5: Solve for x
    x = 12,544,632,238.55/128,242.20
  6. Step 6: Final answer
    x = 97,819.85

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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.