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Finding the Fourth Proportional to 156,710.10, 216,253.86 and 85,088.48

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Solution

The fourth proportional to 156,710.10, 216,253.86 and 85,088.48 is: 117,418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,710.10 : 216,253.86 = 85,088.48 : x
  2. Step 2: Convert to fraction form
    156,710.10/216,253.86 = 85,088.48/x
  3. Step 3: Cross multiply
    156,710.10x = 216,253.86 × 85,088.48
  4. Step 4: Simplify right side
    156,710.10x = 18,400,712,241.53
  5. Step 5: Solve for x
    x = 18,400,712,241.53/156,710.10
  6. Step 6: Final answer
    x = 117,418.80

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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.