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Finding the Fourth Proportional to 156,602.45, 216,204.18 and 102,979.94

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Solution

The fourth proportional to 156,602.45, 216,204.18 and 102,979.94 is: 142,173.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,602.45 : 216,204.18 = 102,979.94 : x
  2. Step 2: Convert to fraction form
    156,602.45/216,204.18 = 102,979.94/x
  3. Step 3: Cross multiply
    156,602.45x = 216,204.18 × 102,979.94
  4. Step 4: Simplify right side
    156,602.45x = 22,264,692,403.13
  5. Step 5: Solve for x
    x = 22,264,692,403.13/156,602.45
  6. Step 6: Final answer
    x = 142,173.34

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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.