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Finding the Fourth Proportional to 139,737.20, 209,605.80 and 112,089.20

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Solution

The fourth proportional to 139,737.20, 209,605.80 and 112,089.20 is: 168,133.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,737.20 : 209,605.80 = 112,089.20 : x
  2. Step 2: Convert to fraction form
    139,737.20/209,605.80 = 112,089.20/x
  3. Step 3: Cross multiply
    139,737.20x = 209,605.80 × 112,089.20
  4. Step 4: Simplify right side
    139,737.20x = 23,494,546,437.36
  5. Step 5: Solve for x
    x = 23,494,546,437.36/139,737.20
  6. Step 6: Final answer
    x = 168,133.80

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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.