Home / 86,623.70-129,826.20-42,154.70

Finding the Fourth Proportional to 86,623.70, 129,826.20 and 42,154.70

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Solution

The fourth proportional to 86,623.70, 129,826.20 and 42,154.70 is: 63,178.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,623.70 : 129,826.20 = 42,154.70 : x
  2. Step 2: Convert to fraction form
    86,623.70/129,826.20 = 42,154.70/x
  3. Step 3: Cross multiply
    86,623.70x = 129,826.20 × 42,154.70
  4. Step 4: Simplify right side
    86,623.70x = 5,472,784,513.14
  5. Step 5: Solve for x
    x = 5,472,784,513.14/86,623.70
  6. Step 6: Final answer
    x = 63,178.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.