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Finding the Fourth Proportional to 156,648.65, 216,175.30 and 85,028.66

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Solution

The fourth proportional to 156,648.65, 216,175.30 and 85,028.66 is: 117,339.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,648.65 : 216,175.30 = 85,028.66 : x
  2. Step 2: Convert to fraction form
    156,648.65/216,175.30 = 85,028.66/x
  3. Step 3: Cross multiply
    156,648.65x = 216,175.30 × 85,028.66
  4. Step 4: Simplify right side
    156,648.65x = 18,381,094,790.65
  5. Step 5: Solve for x
    x = 18,381,094,790.65/156,648.65
  6. Step 6: Final answer
    x = 117,339.63

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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.