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Finding the Fourth Proportional to 128,133.66, 192,180.80 and 42,746.04

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Solution

The fourth proportional to 128,133.66, 192,180.80 and 42,746.04 is: 64,112.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,133.66 : 192,180.80 = 42,746.04 : x
  2. Step 2: Convert to fraction form
    128,133.66/192,180.80 = 42,746.04/x
  3. Step 3: Cross multiply
    128,133.66x = 192,180.80 × 42,746.04
  4. Step 4: Simplify right side
    128,133.66x = 8,214,968,164.03
  5. Step 5: Solve for x
    x = 8,214,968,164.03/128,133.66
  6. Step 6: Final answer
    x = 64,112.49

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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.