Home / 156,929.18-216,559.71-85,311

Finding the Fourth Proportional to 156,929.18, 216,559.71 and 85,311

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Solution

The fourth proportional to 156,929.18, 216,559.71 and 85,311 is: 117,727.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,929.18 : 216,559.71 = 85,311 : x
  2. Step 2: Convert to fraction form
    156,929.18/216,559.71 = 85,311/x
  3. Step 3: Cross multiply
    156,929.18x = 216,559.71 × 85,311
  4. Step 4: Simplify right side
    156,929.18x = 18,474,925,419.81
  5. Step 5: Solve for x
    x = 18,474,925,419.81/156,929.18
  6. Step 6: Final answer
    x = 117,727.79

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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.