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Finding the Fourth Proportional to 86,538.70, 129,821.55 and 27,368.74

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Solution

The fourth proportional to 86,538.70, 129,821.55 and 27,368.74 is: 41,057.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,538.70 : 129,821.55 = 27,368.74 : x
  2. Step 2: Convert to fraction form
    86,538.70/129,821.55 = 27,368.74/x
  3. Step 3: Cross multiply
    86,538.70x = 129,821.55 × 27,368.74
  4. Step 4: Simplify right side
    86,538.70x = 3,553,052,248.35
  5. Step 5: Solve for x
    x = 3,553,052,248.35/86,538.70
  6. Step 6: Final answer
    x = 41,057.38

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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.