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Finding the Fourth Proportional to 156,840, 216,440.22 and 85,220.01

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Solution

The fourth proportional to 156,840, 216,440.22 and 85,220.01 is: 117,604.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,840 : 216,440.22 = 85,220.01 : x
  2. Step 2: Convert to fraction form
    156,840/216,440.22 = 85,220.01/x
  3. Step 3: Cross multiply
    156,840x = 216,440.22 × 85,220.01
  4. Step 4: Simplify right side
    156,840x = 18,445,037,712.80
  5. Step 5: Solve for x
    x = 18,445,037,712.80/156,840
  6. Step 6: Final answer
    x = 117,604.17

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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.