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Finding the Fourth Proportional to 229,134.96, 316,220.76 and 128,539.44

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Solution

The fourth proportional to 229,134.96, 316,220.76 and 128,539.44 is: 177,392.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,134.96 : 316,220.76 = 128,539.44 : x
  2. Step 2: Convert to fraction form
    229,134.96/316,220.76 = 128,539.44/x
  3. Step 3: Cross multiply
    229,134.96x = 316,220.76 × 128,539.44
  4. Step 4: Simplify right side
    229,134.96x = 40,646,839,406.77
  5. Step 5: Solve for x
    x = 40,646,839,406.77/229,134.96
  6. Step 6: Final answer
    x = 177,392.57

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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.