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Finding the Fourth Proportional to 156,768.76, 216,341.51 and 85,149.98

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Solution

The fourth proportional to 156,768.76, 216,341.51 and 85,149.98 is: 117,507.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,768.76 : 216,341.51 = 85,149.98 : x
  2. Step 2: Convert to fraction form
    156,768.76/216,341.51 = 85,149.98/x
  3. Step 3: Cross multiply
    156,768.76x = 216,341.51 × 85,149.98
  4. Step 4: Simplify right side
    156,768.76x = 18,421,473,742.21
  5. Step 5: Solve for x
    x = 18,421,473,742.21/156,768.76
  6. Step 6: Final answer
    x = 117,507.30

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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.