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Finding the Fourth Proportional to 156,630.44, 216,144.51 and 85,009.02

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Solution

The fourth proportional to 156,630.44, 216,144.51 and 85,009.02 is: 117,309.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,630.44 : 216,144.51 = 85,009.02 : x
  2. Step 2: Convert to fraction form
    156,630.44/216,144.51 = 85,009.02/x
  3. Step 3: Cross multiply
    156,630.44x = 216,144.51 × 85,009.02
  4. Step 4: Simplify right side
    156,630.44x = 18,374,232,973.48
  5. Step 5: Solve for x
    x = 18,374,232,973.48/156,630.44
  6. Step 6: Final answer
    x = 117,309.47

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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.