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Finding the Fourth Proportional to 156,606.71, 216,118.85 and 84,987.35

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Solution

The fourth proportional to 156,606.71, 216,118.85 and 84,987.35 is: 117,283.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,606.71 : 216,118.85 = 84,987.35 : x
  2. Step 2: Convert to fraction form
    156,606.71/216,118.85 = 84,987.35/x
  3. Step 3: Cross multiply
    156,606.71x = 216,118.85 × 84,987.35
  4. Step 4: Simplify right side
    156,606.71x = 18,367,367,921.61
  5. Step 5: Solve for x
    x = 18,367,367,921.61/156,606.71
  6. Step 6: Final answer
    x = 117,283.40

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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.