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Finding the Fourth Proportional to 229,155, 316,236.06 and 128,555.16

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Solution

The fourth proportional to 229,155, 316,236.06 and 128,555.16 is: 177,407.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,155 : 316,236.06 = 128,555.16 : x
  2. Step 2: Convert to fraction form
    229,155/316,236.06 = 128,555.16/x
  3. Step 3: Cross multiply
    229,155x = 316,236.06 × 128,555.16
  4. Step 4: Simplify right side
    229,155x = 40,653,777,291.07
  5. Step 5: Solve for x
    x = 40,653,777,291.07/229,155
  6. Step 6: Final answer
    x = 177,407.33

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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.