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Finding the Fourth Proportional to 129,637.70, 194,456.55 and 40,918.40

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Solution

The fourth proportional to 129,637.70, 194,456.55 and 40,918.40 is: 61,377.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,637.70 : 194,456.55 = 40,918.40 : x
  2. Step 2: Convert to fraction form
    129,637.70/194,456.55 = 40,918.40/x
  3. Step 3: Cross multiply
    129,637.70x = 194,456.55 × 40,918.40
  4. Step 4: Simplify right side
    129,637.70x = 7,956,850,895.52
  5. Step 5: Solve for x
    x = 7,956,850,895.52/129,637.70
  6. Step 6: Final answer
    x = 61,377.60

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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.