Home / 145,013.76-200,115.84-81,350.40

Finding the Fourth Proportional to 145,013.76, 200,115.84 and 81,350.40

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Solution

The fourth proportional to 145,013.76, 200,115.84 and 81,350.40 is: 112,261.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,013.76 : 200,115.84 = 81,350.40 : x
  2. Step 2: Convert to fraction form
    145,013.76/200,115.84 = 81,350.40/x
  3. Step 3: Cross multiply
    145,013.76x = 200,115.84 × 81,350.40
  4. Step 4: Simplify right side
    145,013.76x = 16,279,503,630.34
  5. Step 5: Solve for x
    x = 16,279,503,630.34/145,013.76
  6. Step 6: Final answer
    x = 112,261.79

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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.