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Finding the Fourth Proportional to 140,605.80, 210,908.70 and 129,780.15

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Solution

The fourth proportional to 140,605.80, 210,908.70 and 129,780.15 is: 194,670.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,605.80 : 210,908.70 = 129,780.15 : x
  2. Step 2: Convert to fraction form
    140,605.80/210,908.70 = 129,780.15/x
  3. Step 3: Cross multiply
    140,605.80x = 210,908.70 × 129,780.15
  4. Step 4: Simplify right side
    140,605.80x = 27,371,762,722.31
  5. Step 5: Solve for x
    x = 27,371,762,722.31/140,605.80
  6. Step 6: Final answer
    x = 194,670.23

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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.