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Finding the Fourth Proportional to 156,681.72, 216,223.02 and 85,061.88

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Solution

The fourth proportional to 156,681.72, 216,223.02 and 85,061.88 is: 117,386.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,681.72 : 216,223.02 = 85,061.88 : x
  2. Step 2: Convert to fraction form
    156,681.72/216,223.02 = 85,061.88/x
  3. Step 3: Cross multiply
    156,681.72x = 216,223.02 × 85,061.88
  4. Step 4: Simplify right side
    156,681.72x = 18,392,336,580.48
  5. Step 5: Solve for x
    x = 18,392,336,580.48/156,681.72
  6. Step 6: Final answer
    x = 117,386.61

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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.