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Finding the Fourth Proportional to 172,298.78, 237,737.46 and 100,664.96

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Solution

The fourth proportional to 172,298.78, 237,737.46 and 100,664.96 is: 138,897.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,298.78 : 237,737.46 = 100,664.96 : x
  2. Step 2: Convert to fraction form
    172,298.78/237,737.46 = 100,664.96/x
  3. Step 3: Cross multiply
    172,298.78x = 237,737.46 × 100,664.96
  4. Step 4: Simplify right side
    172,298.78x = 23,931,831,901.40
  5. Step 5: Solve for x
    x = 23,931,831,901.40/172,298.78
  6. Step 6: Final answer
    x = 138,897.28

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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.