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Finding the Fourth Proportional to 128,908.80, 193,316.86 and 44,646.29

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Solution

The fourth proportional to 128,908.80, 193,316.86 and 44,646.29 is: 66,953.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,908.80 : 193,316.86 = 44,646.29 : x
  2. Step 2: Convert to fraction form
    128,908.80/193,316.86 = 44,646.29/x
  3. Step 3: Cross multiply
    128,908.80x = 193,316.86 × 44,646.29
  4. Step 4: Simplify right side
    128,908.80x = 8,630,880,407.61
  5. Step 5: Solve for x
    x = 8,630,880,407.61/128,908.80
  6. Step 6: Final answer
    x = 66,953.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.