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Finding the Fourth Proportional to 145,400.78, 200,806.05 and 129,550.80

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Solution

The fourth proportional to 145,400.78, 200,806.05 and 129,550.80 is: 178,916.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,400.78 : 200,806.05 = 129,550.80 : x
  2. Step 2: Convert to fraction form
    145,400.78/200,806.05 = 129,550.80/x
  3. Step 3: Cross multiply
    145,400.78x = 200,806.05 × 129,550.80
  4. Step 4: Simplify right side
    145,400.78x = 26,014,583,560.01
  5. Step 5: Solve for x
    x = 26,014,583,560.01/145,400.78
  6. Step 6: Final answer
    x = 178,916.40

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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.