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Finding the Fourth Proportional to 145,405.94, 218,019.57 and 56,555.87

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Solution

The fourth proportional to 145,405.94, 218,019.57 and 56,555.87 is: 84,799.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,405.94 : 218,019.57 = 56,555.87 : x
  2. Step 2: Convert to fraction form
    145,405.94/218,019.57 = 56,555.87/x
  3. Step 3: Cross multiply
    145,405.94x = 218,019.57 × 56,555.87
  4. Step 4: Simplify right side
    145,405.94x = 12,330,286,458.38
  5. Step 5: Solve for x
    x = 12,330,286,458.38/145,405.94
  6. Step 6: Final answer
    x = 84,799.06

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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.