Home / 229,140.50-316,216.05-128,540.66

Finding the Fourth Proportional to 229,140.50, 316,216.05 and 128,540.66

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Solution

The fourth proportional to 229,140.50, 316,216.05 and 128,540.66 is: 177,387.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,140.50 : 316,216.05 = 128,540.66 : x
  2. Step 2: Convert to fraction form
    229,140.50/316,216.05 = 128,540.66/x
  3. Step 3: Cross multiply
    229,140.50x = 316,216.05 × 128,540.66
  4. Step 4: Simplify right side
    229,140.50x = 40,646,619,769.59
  5. Step 5: Solve for x
    x = 40,646,619,769.59/229,140.50
  6. Step 6: Final answer
    x = 177,387.32

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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.