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Finding the Fourth Proportional to 156,718.73, 216,272.70 and 85,098.74

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Solution

The fourth proportional to 156,718.73, 216,272.70 and 85,098.74 is: 117,436.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,718.73 : 216,272.70 = 85,098.74 : x
  2. Step 2: Convert to fraction form
    156,718.73/216,272.70 = 85,098.74/x
  3. Step 3: Cross multiply
    156,718.73x = 216,272.70 × 85,098.74
  4. Step 4: Simplify right side
    156,718.73x = 18,404,533,185.03
  5. Step 5: Solve for x
    x = 18,404,533,185.03/156,718.73
  6. Step 6: Final answer
    x = 117,436.72

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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.