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Finding the Fourth Proportional to 156,878.97, 216,492.89 and 85,259.01

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Solution

The fourth proportional to 156,878.97, 216,492.89 and 85,259.01 is: 117,657.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,878.97 : 216,492.89 = 85,259.01 : x
  2. Step 2: Convert to fraction form
    156,878.97/216,492.89 = 85,259.01/x
  3. Step 3: Cross multiply
    156,878.97x = 216,492.89 × 85,259.01
  4. Step 4: Simplify right side
    156,878.97x = 18,457,969,047.14
  5. Step 5: Solve for x
    x = 18,457,969,047.14/156,878.97
  6. Step 6: Final answer
    x = 117,657.38

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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.