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Finding the Fourth Proportional to 125,560.80, 187,952.40 and 72,813.60

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Solution

The fourth proportional to 125,560.80, 187,952.40 and 72,813.60 is: 108,994.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,560.80 : 187,952.40 = 72,813.60 : x
  2. Step 2: Convert to fraction form
    125,560.80/187,952.40 = 72,813.60/x
  3. Step 3: Cross multiply
    125,560.80x = 187,952.40 × 72,813.60
  4. Step 4: Simplify right side
    125,560.80x = 13,685,490,872.64
  5. Step 5: Solve for x
    x = 13,685,490,872.64/125,560.80
  6. Step 6: Final answer
    x = 108,994.93

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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.