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Finding the Fourth Proportional to 156,987.60, 216,646.98 and 85,371.80

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Solution

The fourth proportional to 156,987.60, 216,646.98 and 85,371.80 is: 117,815.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,987.60 : 216,646.98 = 85,371.80 : x
  2. Step 2: Convert to fraction form
    156,987.60/216,646.98 = 85,371.80/x
  3. Step 3: Cross multiply
    156,987.60x = 216,646.98 × 85,371.80
  4. Step 4: Simplify right side
    156,987.60x = 18,495,542,647.16
  5. Step 5: Solve for x
    x = 18,495,542,647.16/156,987.60
  6. Step 6: Final answer
    x = 117,815.31

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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.