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Finding the Fourth Proportional to 129,775.80, 194,663.70 and 36,281.40

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Solution

The fourth proportional to 129,775.80, 194,663.70 and 36,281.40 is: 54,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,775.80 : 194,663.70 = 36,281.40 : x
  2. Step 2: Convert to fraction form
    129,775.80/194,663.70 = 36,281.40/x
  3. Step 3: Cross multiply
    129,775.80x = 194,663.70 × 36,281.40
  4. Step 4: Simplify right side
    129,775.80x = 7,062,671,565.18
  5. Step 5: Solve for x
    x = 7,062,671,565.18/129,775.80
  6. Step 6: Final answer
    x = 54,422.10

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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.