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Finding the Fourth Proportional to 188,649, 260,272.08 and 128,114.64

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Solution

The fourth proportional to 188,649, 260,272.08 and 128,114.64 is: 176,755.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,649 : 260,272.08 = 128,114.64 : x
  2. Step 2: Convert to fraction form
    188,649/260,272.08 = 128,114.64/x
  3. Step 3: Cross multiply
    188,649x = 260,272.08 × 128,114.64
  4. Step 4: Simplify right side
    188,649x = 33,344,663,831.25
  5. Step 5: Solve for x
    x = 33,344,663,831.25/188,649
  6. Step 6: Final answer
    x = 176,755.05

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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.