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Finding the Fourth Proportional to 156,970.88, 216,618.31 and 85,350.92

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Solution

The fourth proportional to 156,970.88, 216,618.31 and 85,350.92 is: 117,783.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,970.88 : 216,618.31 = 85,350.92 : x
  2. Step 2: Convert to fraction form
    156,970.88/216,618.31 = 85,350.92/x
  3. Step 3: Cross multiply
    156,970.88x = 216,618.31 × 85,350.92
  4. Step 4: Simplify right side
    156,970.88x = 18,488,572,047.35
  5. Step 5: Solve for x
    x = 18,488,572,047.35/156,970.88
  6. Step 6: Final answer
    x = 117,783.45

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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.