Home / 145,015.45-200,122.69-81,354.62

Finding the Fourth Proportional to 145,015.45, 200,122.69 and 81,354.62

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Solution

The fourth proportional to 145,015.45, 200,122.69 and 81,354.62 is: 112,270.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,015.45 : 200,122.69 = 81,354.62 : x
  2. Step 2: Convert to fraction form
    145,015.45/200,122.69 = 81,354.62/x
  3. Step 3: Cross multiply
    145,015.45x = 200,122.69 × 81,354.62
  4. Step 4: Simplify right side
    145,015.45x = 16,280,905,398.33
  5. Step 5: Solve for x
    x = 16,280,905,398.33/145,015.45
  6. Step 6: Final answer
    x = 112,270.14

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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.