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Finding the Fourth Proportional to 156,700.17, 216,247.77 and 85,080.78

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Solution

The fourth proportional to 156,700.17, 216,247.77 and 85,080.78 is: 117,412.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,700.17 : 216,247.77 = 85,080.78 : x
  2. Step 2: Convert to fraction form
    156,700.17/216,247.77 = 85,080.78/x
  3. Step 3: Cross multiply
    156,700.17x = 216,247.77 × 85,080.78
  4. Step 4: Simplify right side
    156,700.17x = 18,398,528,944.86
  5. Step 5: Solve for x
    x = 18,398,528,944.86/156,700.17
  6. Step 6: Final answer
    x = 117,412.31

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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.