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Finding the Fourth Proportional to 229,151.50, 316,231.23 and 128,551.66

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Solution

The fourth proportional to 229,151.50, 316,231.23 and 128,551.66 is: 177,402.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,151.50 : 316,231.23 = 128,551.66 : x
  2. Step 2: Convert to fraction form
    229,151.50/316,231.23 = 128,551.66/x
  3. Step 3: Cross multiply
    229,151.50x = 316,231.23 × 128,551.66
  4. Step 4: Simplify right side
    229,151.50x = 40,652,049,560.34
  5. Step 5: Solve for x
    x = 40,652,049,560.34/229,151.50
  6. Step 6: Final answer
    x = 177,402.50

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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.