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Finding the Fourth Proportional to 125,235.80, 187,853.70 and 72,780.20

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Solution

The fourth proportional to 125,235.80, 187,853.70 and 72,780.20 is: 109,170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,235.80 : 187,853.70 = 72,780.20 : x
  2. Step 2: Convert to fraction form
    125,235.80/187,853.70 = 72,780.20/x
  3. Step 3: Cross multiply
    125,235.80x = 187,853.70 × 72,780.20
  4. Step 4: Simplify right side
    125,235.80x = 13,672,029,856.74
  5. Step 5: Solve for x
    x = 13,672,029,856.74/125,235.80
  6. Step 6: Final answer
    x = 109,170.30

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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.