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Finding the Fourth Proportional to 203,520.64, 280,860.80 and 112,878.40

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Solution

The fourth proportional to 203,520.64, 280,860.80 and 112,878.40 is: 155,773.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,520.64 : 280,860.80 = 112,878.40 : x
  2. Step 2: Convert to fraction form
    203,520.64/280,860.80 = 112,878.40/x
  3. Step 3: Cross multiply
    203,520.64x = 280,860.80 × 112,878.40
  4. Step 4: Simplify right side
    203,520.64x = 31,703,117,726.72
  5. Step 5: Solve for x
    x = 31,703,117,726.72/203,520.64
  6. Step 6: Final answer
    x = 155,773.48

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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.