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Finding the Fourth Proportional to 124,813.80, 187,220.70 and 105,057.90

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Solution

The fourth proportional to 124,813.80, 187,220.70 and 105,057.90 is: 157,586.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,813.80 : 187,220.70 = 105,057.90 : x
  2. Step 2: Convert to fraction form
    124,813.80/187,220.70 = 105,057.90/x
  3. Step 3: Cross multiply
    124,813.80x = 187,220.70 × 105,057.90
  4. Step 4: Simplify right side
    124,813.80x = 19,669,013,578.53
  5. Step 5: Solve for x
    x = 19,669,013,578.53/124,813.80
  6. Step 6: Final answer
    x = 157,586.85

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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.