Home / 145,113.26-200,245.31-81,438.75

Finding the Fourth Proportional to 145,113.26, 200,245.31 and 81,438.75

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Solution

The fourth proportional to 145,113.26, 200,245.31 and 81,438.75 is: 112,379.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,113.26 : 200,245.31 = 81,438.75 : x
  2. Step 2: Convert to fraction form
    145,113.26/200,245.31 = 81,438.75/x
  3. Step 3: Cross multiply
    145,113.26x = 200,245.31 × 81,438.75
  4. Step 4: Simplify right side
    145,113.26x = 16,307,727,332.57
  5. Step 5: Solve for x
    x = 16,307,727,332.57/145,113.26
  6. Step 6: Final answer
    x = 112,379.31

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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.