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Finding the Fourth Proportional to 229,097.79, 316,215 and 128,528.19

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Solution

The fourth proportional to 229,097.79, 316,215 and 128,528.19 is: 177,402.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,097.79 : 316,215 = 128,528.19 : x
  2. Step 2: Convert to fraction form
    229,097.79/316,215 = 128,528.19/x
  3. Step 3: Cross multiply
    229,097.79x = 316,215 × 128,528.19
  4. Step 4: Simplify right side
    229,097.79x = 40,642,541,600.85
  5. Step 5: Solve for x
    x = 40,642,541,600.85/229,097.79
  6. Step 6: Final answer
    x = 177,402.59

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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.