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Finding the Fourth Proportional to 156,804.96, 216,391.20 and 85,184.40

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Solution

The fourth proportional to 156,804.96, 216,391.20 and 85,184.40 is: 117,554.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,804.96 : 216,391.20 = 85,184.40 : x
  2. Step 2: Convert to fraction form
    156,804.96/216,391.20 = 85,184.40/x
  3. Step 3: Cross multiply
    156,804.96x = 216,391.20 × 85,184.40
  4. Step 4: Simplify right side
    156,804.96x = 18,433,154,537.28
  5. Step 5: Solve for x
    x = 18,433,154,537.28/156,804.96
  6. Step 6: Final answer
    x = 117,554.66

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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.