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Finding the Fourth Proportional to 70,129.32, 96,774.54 and 39,922.02

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Solution

The fourth proportional to 70,129.32, 96,774.54 and 39,922.02 is: 55,090.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,129.32 : 96,774.54 = 39,922.02 : x
  2. Step 2: Convert to fraction form
    70,129.32/96,774.54 = 39,922.02/x
  3. Step 3: Cross multiply
    70,129.32x = 96,774.54 × 39,922.02
  4. Step 4: Simplify right side
    70,129.32x = 3,863,435,121.37
  5. Step 5: Solve for x
    x = 3,863,435,121.37/70,129.32
  6. Step 6: Final answer
    x = 55,090.16

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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.