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Finding the Fourth Proportional to 105,745.40, 158,579.70 and 53,137.40

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Solution

The fourth proportional to 105,745.40, 158,579.70 and 53,137.40 is: 79,686.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,745.40 : 158,579.70 = 53,137.40 : x
  2. Step 2: Convert to fraction form
    105,745.40/158,579.70 = 53,137.40/x
  3. Step 3: Cross multiply
    105,745.40x = 158,579.70 × 53,137.40
  4. Step 4: Simplify right side
    105,745.40x = 8,426,512,950.78
  5. Step 5: Solve for x
    x = 8,426,512,950.78/105,745.40
  6. Step 6: Final answer
    x = 79,686.80

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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.