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Finding the Fourth Proportional to 139,532.88, 192,555.72 and 75,870.64

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Solution

The fourth proportional to 139,532.88, 192,555.72 and 75,870.64 is: 104,701.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,532.88 : 192,555.72 = 75,870.64 : x
  2. Step 2: Convert to fraction form
    139,532.88/192,555.72 = 75,870.64/x
  3. Step 3: Cross multiply
    139,532.88x = 192,555.72 × 75,870.64
  4. Step 4: Simplify right side
    139,532.88x = 14,609,325,712.06
  5. Step 5: Solve for x
    x = 14,609,325,712.06/139,532.88
  6. Step 6: Final answer
    x = 104,701.67

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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.