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Finding the Fourth Proportional to 145,402.78, 200,808.80 and 129,552.80

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Solution

The fourth proportional to 145,402.78, 200,808.80 and 129,552.80 is: 178,919.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,402.78 : 200,808.80 = 129,552.80 : x
  2. Step 2: Convert to fraction form
    145,402.78/200,808.80 = 129,552.80/x
  3. Step 3: Cross multiply
    145,402.78x = 200,808.80 × 129,552.80
  4. Step 4: Simplify right side
    145,402.78x = 26,015,342,304.64
  5. Step 5: Solve for x
    x = 26,015,342,304.64/145,402.78
  6. Step 6: Final answer
    x = 178,919.15

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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.