Home / 145,015.10-200,122.20-81,354.26

Finding the Fourth Proportional to 145,015.10, 200,122.20 and 81,354.26

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Solution

The fourth proportional to 145,015.10, 200,122.20 and 81,354.26 is: 112,269.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,015.10 : 200,122.20 = 81,354.26 : x
  2. Step 2: Convert to fraction form
    145,015.10/200,122.20 = 81,354.26/x
  3. Step 3: Cross multiply
    145,015.10x = 200,122.20 × 81,354.26
  4. Step 4: Simplify right side
    145,015.10x = 16,280,793,490.57
  5. Step 5: Solve for x
    x = 16,280,793,490.57/145,015.10
  6. Step 6: Final answer
    x = 112,269.64

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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.