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Finding the Fourth Proportional to 235,840.85, 325,457.13 and 128,410.88

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Solution

The fourth proportional to 235,840.85, 325,457.13 and 128,410.88 is: 177,205.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,840.85 : 325,457.13 = 128,410.88 : x
  2. Step 2: Convert to fraction form
    235,840.85/325,457.13 = 128,410.88/x
  3. Step 3: Cross multiply
    235,840.85x = 325,457.13 × 128,410.88
  4. Step 4: Simplify right side
    235,840.85x = 41,792,236,465.57
  5. Step 5: Solve for x
    x = 41,792,236,465.57/235,840.85
  6. Step 6: Final answer
    x = 177,205.25

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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.