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Finding the Fourth Proportional to 225,028.76, 310,539.80 and 128,229.86

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Solution

The fourth proportional to 225,028.76, 310,539.80 and 128,229.86 is: 176,957.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,028.76 : 310,539.80 = 128,229.86 : x
  2. Step 2: Convert to fraction form
    225,028.76/310,539.80 = 128,229.86/x
  3. Step 3: Cross multiply
    225,028.76x = 310,539.80 × 128,229.86
  4. Step 4: Simplify right side
    225,028.76x = 39,820,472,884.58
  5. Step 5: Solve for x
    x = 39,820,472,884.58/225,028.76
  6. Step 6: Final answer
    x = 176,957.26

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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.