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Finding the Fourth Proportional to 101,728.32, 140,380.32 and 56,403.36

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Solution

The fourth proportional to 101,728.32, 140,380.32 and 56,403.36 is: 77,834.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,728.32 : 140,380.32 = 56,403.36 : x
  2. Step 2: Convert to fraction form
    101,728.32/140,380.32 = 56,403.36/x
  3. Step 3: Cross multiply
    101,728.32x = 140,380.32 × 56,403.36
  4. Step 4: Simplify right side
    101,728.32x = 7,917,921,725.88
  5. Step 5: Solve for x
    x = 7,917,921,725.88/101,728.32
  6. Step 6: Final answer
    x = 77,834.00

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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.