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Finding the Fourth Proportional to 139,513.80, 209,270.70 and 122,017.80

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Solution

The fourth proportional to 139,513.80, 209,270.70 and 122,017.80 is: 183,026.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,513.80 : 209,270.70 = 122,017.80 : x
  2. Step 2: Convert to fraction form
    139,513.80/209,270.70 = 122,017.80/x
  3. Step 3: Cross multiply
    139,513.80x = 209,270.70 × 122,017.80
  4. Step 4: Simplify right side
    139,513.80x = 25,534,750,418.46
  5. Step 5: Solve for x
    x = 25,534,750,418.46/139,513.80
  6. Step 6: Final answer
    x = 183,026.70

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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.