Home / 117,215.78-161,972.34-85,329.32

Finding the Fourth Proportional to 117,215.78, 161,972.34 and 85,329.32

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Solution

The fourth proportional to 117,215.78, 161,972.34 and 85,329.32 is: 117,910.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,215.78 : 161,972.34 = 85,329.32 : x
  2. Step 2: Convert to fraction form
    117,215.78/161,972.34 = 85,329.32/x
  3. Step 3: Cross multiply
    117,215.78x = 161,972.34 × 85,329.32
  4. Step 4: Simplify right side
    117,215.78x = 13,820,989,631.01
  5. Step 5: Solve for x
    x = 13,820,989,631.01/117,215.78
  6. Step 6: Final answer
    x = 117,910.66

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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.