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Finding the Fourth Proportional to 86,567.80, 129,900.30 and 36,639.40

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Solution

The fourth proportional to 86,567.80, 129,900.30 and 36,639.40 is: 54,979.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,567.80 : 129,900.30 = 36,639.40 : x
  2. Step 2: Convert to fraction form
    86,567.80/129,900.30 = 36,639.40/x
  3. Step 3: Cross multiply
    86,567.80x = 129,900.30 × 36,639.40
  4. Step 4: Simplify right side
    86,567.80x = 4,759,469,051.82
  5. Step 5: Solve for x
    x = 4,759,469,051.82/86,567.80
  6. Step 6: Final answer
    x = 54,979.67

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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.