Home / 139,176.90-192,065.58-78,748.20

Finding the Fourth Proportional to 139,176.90, 192,065.58 and 78,748.20

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Solution

The fourth proportional to 139,176.90, 192,065.58 and 78,748.20 is: 108,673.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,176.90 : 192,065.58 = 78,748.20 : x
  2. Step 2: Convert to fraction form
    139,176.90/192,065.58 = 78,748.20/x
  3. Step 3: Cross multiply
    139,176.90x = 192,065.58 × 78,748.20
  4. Step 4: Simplify right side
    139,176.90x = 15,124,818,706.96
  5. Step 5: Solve for x
    x = 15,124,818,706.96/139,176.90
  6. Step 6: Final answer
    x = 108,673.34

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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.