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Finding the Fourth Proportional to 136,320.53, 188,120.54 and 78,967.67

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Solution

The fourth proportional to 136,320.53, 188,120.54 and 78,967.67 is: 108,974.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,320.53 : 188,120.54 = 78,967.67 : x
  2. Step 2: Convert to fraction form
    136,320.53/188,120.54 = 78,967.67/x
  3. Step 3: Cross multiply
    136,320.53x = 188,120.54 × 78,967.67
  4. Step 4: Simplify right side
    136,320.53x = 14,855,439,979.76
  5. Step 5: Solve for x
    x = 14,855,439,979.76/136,320.53
  6. Step 6: Final answer
    x = 108,974.35

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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.