Home / 156,638.39-216,161.00-85,018.40

Finding the Fourth Proportional to 156,638.39, 216,161.00 and 85,018.40

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Solution

The fourth proportional to 156,638.39, 216,161.00 and 85,018.40 is: 117,325.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,638.39 : 216,161.00 = 85,018.40 : x
  2. Step 2: Convert to fraction form
    156,638.39/216,161.00 = 85,018.40/x
  3. Step 3: Cross multiply
    156,638.39x = 216,161.00 × 85,018.40
  4. Step 4: Simplify right side
    156,638.39x = 18,377,660,856.50
  5. Step 5: Solve for x
    x = 18,377,660,856.50/156,638.39
  6. Step 6: Final answer
    x = 117,325.40

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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.