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Finding the Fourth Proportional to 230,893.94, 318,630.59 and 128,921.13

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Solution

The fourth proportional to 230,893.94, 318,630.59 and 128,921.13 is: 177,909.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,893.94 : 318,630.59 = 128,921.13 : x
  2. Step 2: Convert to fraction form
    230,893.94/318,630.59 = 128,921.13/x
  3. Step 3: Cross multiply
    230,893.94x = 318,630.59 × 128,921.13
  4. Step 4: Simplify right side
    230,893.94x = 41,078,215,070.76
  5. Step 5: Solve for x
    x = 41,078,215,070.76/230,893.94
  6. Step 6: Final answer
    x = 177,909.46

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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.