Home / 128,264.13-192,208.48-72,213.60

Finding the Fourth Proportional to 128,264.13, 192,208.48 and 72,213.60

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Solution

The fourth proportional to 128,264.13, 192,208.48 and 72,213.60 is: 108,214.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,264.13 : 192,208.48 = 72,213.60 : x
  2. Step 2: Convert to fraction form
    128,264.13/192,208.48 = 72,213.60/x
  3. Step 3: Cross multiply
    128,264.13x = 192,208.48 × 72,213.60
  4. Step 4: Simplify right side
    128,264.13x = 13,880,066,831.58
  5. Step 5: Solve for x
    x = 13,880,066,831.58/128,264.13
  6. Step 6: Final answer
    x = 108,214.72

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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.