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Finding the Fourth Proportional to 156,637.52, 216,160 and 85,017.56

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Solution

The fourth proportional to 156,637.52, 216,160 and 85,017.56 is: 117,324.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,637.52 : 216,160 = 85,017.56 : x
  2. Step 2: Convert to fraction form
    156,637.52/216,160 = 85,017.56/x
  3. Step 3: Cross multiply
    156,637.52x = 216,160 × 85,017.56
  4. Step 4: Simplify right side
    156,637.52x = 18,377,395,769.60
  5. Step 5: Solve for x
    x = 18,377,395,769.60/156,637.52
  6. Step 6: Final answer
    x = 117,324.35

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1.5x scale

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.