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Finding the Fourth Proportional to 125,211.40, 187,817.10 and 105,771.40

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Solution

The fourth proportional to 125,211.40, 187,817.10 and 105,771.40 is: 158,657.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,211.40 : 187,817.10 = 105,771.40 : x
  2. Step 2: Convert to fraction form
    125,211.40/187,817.10 = 105,771.40/x
  3. Step 3: Cross multiply
    125,211.40x = 187,817.10 × 105,771.40
  4. Step 4: Simplify right side
    125,211.40x = 19,865,677,610.94
  5. Step 5: Solve for x
    x = 19,865,677,610.94/125,211.40
  6. Step 6: Final answer
    x = 158,657.10

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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.