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Finding the Fourth Proportional to 156,900.78, 216,515.90 and 88,913.77

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Solution

The fourth proportional to 156,900.78, 216,515.90 and 88,913.77 is: 122,696.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,900.78 : 216,515.90 = 88,913.77 : x
  2. Step 2: Convert to fraction form
    156,900.78/216,515.90 = 88,913.77/x
  3. Step 3: Cross multiply
    156,900.78x = 216,515.90 × 88,913.77
  4. Step 4: Simplify right side
    156,900.78x = 19,251,244,614.94
  5. Step 5: Solve for x
    x = 19,251,244,614.94/156,900.78
  6. Step 6: Final answer
    x = 122,696.93

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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.