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Finding the Fourth Proportional to 230,645.86, 318,291.42 and 128,671.32

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Solution

The fourth proportional to 230,645.86, 318,291.42 and 128,671.32 is: 177,566.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,645.86 : 318,291.42 = 128,671.32 : x
  2. Step 2: Convert to fraction form
    230,645.86/318,291.42 = 128,671.32/x
  3. Step 3: Cross multiply
    230,645.86x = 318,291.42 × 128,671.32
  4. Step 4: Simplify right side
    230,645.86x = 40,954,977,831.49
  5. Step 5: Solve for x
    x = 40,954,977,831.49/230,645.86
  6. Step 6: Final answer
    x = 177,566.50

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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.