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Finding the Fourth Proportional to 139,816.80, 192,948.12 and 76,154.04

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Solution

The fourth proportional to 139,816.80, 192,948.12 and 76,154.04 is: 105,093.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,816.80 : 192,948.12 = 76,154.04 : x
  2. Step 2: Convert to fraction form
    139,816.80/192,948.12 = 76,154.04/x
  3. Step 3: Cross multiply
    139,816.80x = 192,948.12 × 76,154.04
  4. Step 4: Simplify right side
    139,816.80x = 14,693,778,848.40
  5. Step 5: Solve for x
    x = 14,693,778,848.40/139,816.80
  6. Step 6: Final answer
    x = 105,093.09

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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.