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Finding the Fourth Proportional to 156,551.92, 216,040.44 and 84,931.72

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Solution

The fourth proportional to 156,551.92, 216,040.44 and 84,931.72 is: 117,205.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,551.92 : 216,040.44 = 84,931.72 : x
  2. Step 2: Convert to fraction form
    156,551.92/216,040.44 = 84,931.72/x
  3. Step 3: Cross multiply
    156,551.92x = 216,040.44 × 84,931.72
  4. Step 4: Simplify right side
    156,551.92x = 18,348,686,158.76
  5. Step 5: Solve for x
    x = 18,348,686,158.76/156,551.92
  6. Step 6: Final answer
    x = 117,205.12

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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.