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Finding the Fourth Proportional to 229,430.81, 316,618.67 and 128,832.41

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Solution

The fourth proportional to 229,430.81, 316,618.67 and 128,832.41 is: 177,791.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,430.81 : 316,618.67 = 128,832.41 : x
  2. Step 2: Convert to fraction form
    229,430.81/316,618.67 = 128,832.41/x
  3. Step 3: Cross multiply
    229,430.81x = 316,618.67 × 128,832.41
  4. Step 4: Simplify right side
    229,430.81x = 40,790,746,307.09
  5. Step 5: Solve for x
    x = 40,790,746,307.09/229,430.81
  6. Step 6: Final answer
    x = 177,791.06

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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.