Home / 156,930.87-216,562.05-85,312.68

Finding the Fourth Proportional to 156,930.87, 216,562.05 and 85,312.68

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Solution

The fourth proportional to 156,930.87, 216,562.05 and 85,312.68 is: 117,730.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,930.87 : 216,562.05 = 85,312.68 : x
  2. Step 2: Convert to fraction form
    156,930.87/216,562.05 = 85,312.68/x
  3. Step 3: Cross multiply
    156,930.87x = 216,562.05 × 85,312.68
  4. Step 4: Simplify right side
    156,930.87x = 18,475,488,871.79
  5. Step 5: Solve for x
    x = 18,475,488,871.79/156,930.87
  6. Step 6: Final answer
    x = 117,730.11

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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.