Home / 156,640.24-216,157.74-85,018.72

Finding the Fourth Proportional to 156,640.24, 216,157.74 and 85,018.72

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Solution

The fourth proportional to 156,640.24, 216,157.74 and 85,018.72 is: 117,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,640.24 : 216,157.74 = 85,018.72 : x
  2. Step 2: Convert to fraction form
    156,640.24/216,157.74 = 85,018.72/x
  3. Step 3: Cross multiply
    156,640.24x = 216,157.74 × 85,018.72
  4. Step 4: Simplify right side
    156,640.24x = 18,377,455,125.83
  5. Step 5: Solve for x
    x = 18,377,455,125.83/156,640.24
  6. Step 6: Final answer
    x = 117,322.70

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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.