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Finding the Fourth Proportional to 145,393.57, 218,145.94 and 56,708.90

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Solution

The fourth proportional to 145,393.57, 218,145.94 and 56,708.90 is: 85,085.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,393.57 : 218,145.94 = 56,708.90 : x
  2. Step 2: Convert to fraction form
    145,393.57/218,145.94 = 56,708.90/x
  3. Step 3: Cross multiply
    145,393.57x = 218,145.94 × 56,708.90
  4. Step 4: Simplify right side
    145,393.57x = 12,370,816,296.87
  5. Step 5: Solve for x
    x = 12,370,816,296.87/145,393.57
  6. Step 6: Final answer
    x = 85,085.03

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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.