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Finding the Fourth Proportional to 135,347.62, 186,736.78 and 78,748.06

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Solution

The fourth proportional to 135,347.62, 186,736.78 and 78,748.06 is: 108,647.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,347.62 : 186,736.78 = 78,748.06 : x
  2. Step 2: Convert to fraction form
    135,347.62/186,736.78 = 78,748.06/x
  3. Step 3: Cross multiply
    135,347.62x = 186,736.78 × 78,748.06
  4. Step 4: Simplify right side
    135,347.62x = 14,705,159,155.65
  5. Step 5: Solve for x
    x = 14,705,159,155.65/135,347.62
  6. Step 6: Final answer
    x = 108,647.34

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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.