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Finding the Fourth Proportional to 235,885.15, 325,525.40 and 128,457.28

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Solution

The fourth proportional to 235,885.15, 325,525.40 and 128,457.28 is: 177,273.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,885.15 : 325,525.40 = 128,457.28 : x
  2. Step 2: Convert to fraction form
    235,885.15/325,525.40 = 128,457.28/x
  3. Step 3: Cross multiply
    235,885.15x = 325,525.40 × 128,457.28
  4. Step 4: Simplify right side
    235,885.15x = 41,816,107,454.91
  5. Step 5: Solve for x
    x = 41,816,107,454.91/235,885.15
  6. Step 6: Final answer
    x = 177,273.17

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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.