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Finding the Fourth Proportional to 139,437.90, 192,423.77 and 79,020.06

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Solution

The fourth proportional to 139,437.90, 192,423.77 and 79,020.06 is: 109,047.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,437.90 : 192,423.77 = 79,020.06 : x
  2. Step 2: Convert to fraction form
    139,437.90/192,423.77 = 79,020.06/x
  3. Step 3: Cross multiply
    139,437.90x = 192,423.77 × 79,020.06
  4. Step 4: Simplify right side
    139,437.90x = 15,205,337,455.73
  5. Step 5: Solve for x
    x = 15,205,337,455.73/139,437.90
  6. Step 6: Final answer
    x = 109,047.38

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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.