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Finding the Fourth Proportional to 156,886.69, 216,503.66 and 85,266.71

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Solution

The fourth proportional to 156,886.69, 216,503.66 and 85,266.71 is: 117,668.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,886.69 : 216,503.66 = 85,266.71 : x
  2. Step 2: Convert to fraction form
    156,886.69/216,503.66 = 85,266.71/x
  3. Step 3: Cross multiply
    156,886.69x = 216,503.66 × 85,266.71
  4. Step 4: Simplify right side
    156,886.69x = 18,460,554,906.08
  5. Step 5: Solve for x
    x = 18,460,554,906.08/156,886.69
  6. Step 6: Final answer
    x = 117,668.08

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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.