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Finding the Fourth Proportional to 145,438.61, 218,160.64 and 45,596.59

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Solution

The fourth proportional to 145,438.61, 218,160.64 and 45,596.59 is: 68,395.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,438.61 : 218,160.64 = 45,596.59 : x
  2. Step 2: Convert to fraction form
    145,438.61/218,160.64 = 45,596.59/x
  3. Step 3: Cross multiply
    145,438.61x = 218,160.64 × 45,596.59
  4. Step 4: Simplify right side
    145,438.61x = 9,947,380,767.81
  5. Step 5: Solve for x
    x = 9,947,380,767.81/145,438.61
  6. Step 6: Final answer
    x = 68,395.74

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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.