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Finding the Fourth Proportional to 145,728.25, 218,601.15 and 45,891.70

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Solution

The fourth proportional to 145,728.25, 218,601.15 and 45,891.70 is: 68,840.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,728.25 : 218,601.15 = 45,891.70 : x
  2. Step 2: Convert to fraction form
    145,728.25/218,601.15 = 45,891.70/x
  3. Step 3: Cross multiply
    145,728.25x = 218,601.15 × 45,891.70
  4. Step 4: Simplify right side
    145,728.25x = 10,031,978,395.46
  5. Step 5: Solve for x
    x = 10,031,978,395.46/145,728.25
  6. Step 6: Final answer
    x = 68,840.31

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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.