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Finding the Fourth Proportional to 210,876.86, 316,157.16 and 68,637.12

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Solution

The fourth proportional to 210,876.86, 316,157.16 and 68,637.12 is: 102,904.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,876.86 : 316,157.16 = 68,637.12 : x
  2. Step 2: Convert to fraction form
    210,876.86/316,157.16 = 68,637.12/x
  3. Step 3: Cross multiply
    210,876.86x = 316,157.16 × 68,637.12
  4. Step 4: Simplify right side
    210,876.86x = 21,700,115,682.76
  5. Step 5: Solve for x
    x = 21,700,115,682.76/210,876.86
  6. Step 6: Final answer
    x = 102,904.20

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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.