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Finding the Fourth Proportional to 156,900.68, 216,523.20 and 85,280.51

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Solution

The fourth proportional to 156,900.68, 216,523.20 and 85,280.51 is: 117,687.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,900.68 : 216,523.20 = 85,280.51 : x
  2. Step 2: Convert to fraction form
    156,900.68/216,523.20 = 85,280.51/x
  3. Step 3: Cross multiply
    156,900.68x = 216,523.20 × 85,280.51
  4. Step 4: Simplify right side
    156,900.68x = 18,465,207,840.22
  5. Step 5: Solve for x
    x = 18,465,207,840.22/156,900.68
  6. Step 6: Final answer
    x = 117,687.24

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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.