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Finding the Fourth Proportional to 210,672.30, 316,008.45 and 121,880.10

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Solution

The fourth proportional to 210,672.30, 316,008.45 and 121,880.10 is: 182,820.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,672.30 : 316,008.45 = 121,880.10 : x
  2. Step 2: Convert to fraction form
    210,672.30/316,008.45 = 121,880.10/x
  3. Step 3: Cross multiply
    210,672.30x = 316,008.45 × 121,880.10
  4. Step 4: Simplify right side
    210,672.30x = 38,515,141,486.85
  5. Step 5: Solve for x
    x = 38,515,141,486.85/210,672.30
  6. Step 6: Final answer
    x = 182,820.15

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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.