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Finding the Fourth Proportional to 145,763.40, 218,645.10 and 57,019.80

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Solution

The fourth proportional to 145,763.40, 218,645.10 and 57,019.80 is: 85,529.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,763.40 : 218,645.10 = 57,019.80 : x
  2. Step 2: Convert to fraction form
    145,763.40/218,645.10 = 57,019.80/x
  3. Step 3: Cross multiply
    145,763.40x = 218,645.10 × 57,019.80
  4. Step 4: Simplify right side
    145,763.40x = 12,467,099,872.98
  5. Step 5: Solve for x
    x = 12,467,099,872.98/145,763.40
  6. Step 6: Final answer
    x = 85,529.70

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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.