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Finding the Fourth Proportional to 86,663.70, 129,995.55 and 49,209.30

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Solution

The fourth proportional to 86,663.70, 129,995.55 and 49,209.30 is: 73,813.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,663.70 : 129,995.55 = 49,209.30 : x
  2. Step 2: Convert to fraction form
    86,663.70/129,995.55 = 49,209.30/x
  3. Step 3: Cross multiply
    86,663.70x = 129,995.55 × 49,209.30
  4. Step 4: Simplify right side
    86,663.70x = 6,396,990,018.62
  5. Step 5: Solve for x
    x = 6,396,990,018.62/86,663.70
  6. Step 6: Final answer
    x = 73,813.95

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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.