Home / 156,898.58-216,521.50-85,278.78

Finding the Fourth Proportional to 156,898.58, 216,521.50 and 85,278.78

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Solution

The fourth proportional to 156,898.58, 216,521.50 and 85,278.78 is: 117,685.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,898.58 : 216,521.50 = 85,278.78 : x
  2. Step 2: Convert to fraction form
    156,898.58/216,521.50 = 85,278.78/x
  3. Step 3: Cross multiply
    156,898.58x = 216,521.50 × 85,278.78
  4. Step 4: Simplify right side
    156,898.58x = 18,464,689,363.77
  5. Step 5: Solve for x
    x = 18,464,689,363.77/156,898.58
  6. Step 6: Final answer
    x = 117,685.51

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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.