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Finding the Fourth Proportional to 156,885.80, 216,502.40 and 85,265.79

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Solution

The fourth proportional to 156,885.80, 216,502.40 and 85,265.79 is: 117,666.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,885.80 : 216,502.40 = 85,265.79 : x
  2. Step 2: Convert to fraction form
    156,885.80/216,502.40 = 85,265.79/x
  3. Step 3: Cross multiply
    156,885.80x = 216,502.40 × 85,265.79
  4. Step 4: Simplify right side
    156,885.80x = 18,460,247,746.57
  5. Step 5: Solve for x
    x = 18,460,247,746.57/156,885.80
  6. Step 6: Final answer
    x = 117,666.79

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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.