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Finding the Fourth Proportional to 210,659.28, 316,005.72 and 70,418.64

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Solution

The fourth proportional to 210,659.28, 316,005.72 and 70,418.64 is: 105,633.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,659.28 : 316,005.72 = 70,418.64 : x
  2. Step 2: Convert to fraction form
    210,659.28/316,005.72 = 70,418.64/x
  3. Step 3: Cross multiply
    210,659.28x = 316,005.72 × 70,418.64
  4. Step 4: Simplify right side
    210,659.28x = 22,252,693,034.62
  5. Step 5: Solve for x
    x = 22,252,693,034.62/210,659.28
  6. Step 6: Final answer
    x = 105,633.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.