Home / 156,690.15-215,740.74-138,274.26

Finding the Fourth Proportional to 156,690.15, 215,740.74 and 138,274.26

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Solution

The fourth proportional to 156,690.15, 215,740.74 and 138,274.26 is: 190,384.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,690.15 : 215,740.74 = 138,274.26 : x
  2. Step 2: Convert to fraction form
    156,690.15/215,740.74 = 138,274.26/x
  3. Step 3: Cross multiply
    156,690.15x = 215,740.74 × 138,274.26
  4. Step 4: Simplify right side
    156,690.15x = 29,831,391,175.35
  5. Step 5: Solve for x
    x = 29,831,391,175.35/156,690.15
  6. Step 6: Final answer
    x = 190,384.60

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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.