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Finding the Fourth Proportional to 229,086.72, 316,143.36 and 128,482.56

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Solution

The fourth proportional to 229,086.72, 316,143.36 and 128,482.56 is: 177,308.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,086.72 : 316,143.36 = 128,482.56 : x
  2. Step 2: Convert to fraction form
    229,086.72/316,143.36 = 128,482.56/x
  3. Step 3: Cross multiply
    229,086.72x = 316,143.36 × 128,482.56
  4. Step 4: Simplify right side
    229,086.72x = 40,618,908,219.80
  5. Step 5: Solve for x
    x = 40,618,908,219.80/229,086.72
  6. Step 6: Final answer
    x = 177,308.00

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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.