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Finding the Fourth Proportional to 156,969.90, 216,612.54 and 85,347.45

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Solution

The fourth proportional to 156,969.90, 216,612.54 and 85,347.45 is: 117,776.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,969.90 : 216,612.54 = 85,347.45 : x
  2. Step 2: Convert to fraction form
    156,969.90/216,612.54 = 85,347.45/x
  3. Step 3: Cross multiply
    156,969.90x = 216,612.54 × 85,347.45
  4. Step 4: Simplify right side
    156,969.90x = 18,487,327,927.02
  5. Step 5: Solve for x
    x = 18,487,327,927.02/156,969.90
  6. Step 6: Final answer
    x = 117,776.26

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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.