Home / 135,314.72-186,688.80-78,679.52

Finding the Fourth Proportional to 135,314.72, 186,688.80 and 78,679.52

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Solution

The fourth proportional to 135,314.72, 186,688.80 and 78,679.52 is: 108,551.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,314.72 : 186,688.80 = 78,679.52 : x
  2. Step 2: Convert to fraction form
    135,314.72/186,688.80 = 78,679.52/x
  3. Step 3: Cross multiply
    135,314.72x = 186,688.80 × 78,679.52
  4. Step 4: Simplify right side
    135,314.72x = 14,688,585,173.38
  5. Step 5: Solve for x
    x = 14,688,585,173.38/135,314.72
  6. Step 6: Final answer
    x = 108,551.27

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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.