Home / 145,452.78-200,723.58-81,789.21

Finding the Fourth Proportional to 145,452.78, 200,723.58 and 81,789.21

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Solution

The fourth proportional to 145,452.78, 200,723.58 and 81,789.21 is: 112,868.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,452.78 : 200,723.58 = 81,789.21 : x
  2. Step 2: Convert to fraction form
    145,452.78/200,723.58 = 81,789.21/x
  3. Step 3: Cross multiply
    145,452.78x = 200,723.58 × 81,789.21
  4. Step 4: Simplify right side
    145,452.78x = 16,417,023,036.57
  5. Step 5: Solve for x
    x = 16,417,023,036.57/145,452.78
  6. Step 6: Final answer
    x = 112,868.40

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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.