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Finding the Fourth Proportional to 156,745.84, 216,308.48 and 85,125.28

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Solution

The fourth proportional to 156,745.84, 216,308.48 and 85,125.28 is: 117,472.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,745.84 : 216,308.48 = 85,125.28 : x
  2. Step 2: Convert to fraction form
    156,745.84/216,308.48 = 85,125.28/x
  3. Step 3: Cross multiply
    156,745.84x = 216,308.48 × 85,125.28
  4. Step 4: Simplify right side
    156,745.84x = 18,413,319,926.37
  5. Step 5: Solve for x
    x = 18,413,319,926.37/156,745.84
  6. Step 6: Final answer
    x = 117,472.46

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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.