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Finding the Fourth Proportional to 229,089.88, 316,142.94 and 128,487.88

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Solution

The fourth proportional to 229,089.88, 316,142.94 and 128,487.88 is: 177,312.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,089.88 : 316,142.94 = 128,487.88 : x
  2. Step 2: Convert to fraction form
    229,089.88/316,142.94 = 128,487.88/x
  3. Step 3: Cross multiply
    229,089.88x = 316,142.94 × 128,487.88
  4. Step 4: Simplify right side
    229,089.88x = 40,620,536,137.57
  5. Step 5: Solve for x
    x = 40,620,536,137.57/229,089.88
  6. Step 6: Final answer
    x = 177,312.66

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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.