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Finding the Fourth Proportional to 229,207.77, 316,311.90 and 128,605.77

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Solution

The fourth proportional to 229,207.77, 316,311.90 and 128,605.77 is: 177,478.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,207.77 : 316,311.90 = 128,605.77 : x
  2. Step 2: Convert to fraction form
    229,207.77/316,311.90 = 128,605.77/x
  3. Step 3: Cross multiply
    229,207.77x = 316,311.90 × 128,605.77
  4. Step 4: Simplify right side
    229,207.77x = 40,679,535,459.66
  5. Step 5: Solve for x
    x = 40,679,535,459.66/229,207.77
  6. Step 6: Final answer
    x = 177,478.87

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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.