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Finding the Fourth Proportional to 156,297.60, 215,690.40 and 84,679.40

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Solution

The fourth proportional to 156,297.60, 215,690.40 and 84,679.40 is: 116,857.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,297.60 : 215,690.40 = 84,679.40 : x
  2. Step 2: Convert to fraction form
    156,297.60/215,690.40 = 84,679.40/x
  3. Step 3: Cross multiply
    156,297.60x = 215,690.40 × 84,679.40
  4. Step 4: Simplify right side
    156,297.60x = 18,264,533,657.76
  5. Step 5: Solve for x
    x = 18,264,533,657.76/156,297.60
  6. Step 6: Final answer
    x = 116,857.42

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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.