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Finding the Fourth Proportional to 145,870.55, 218,786.38 and 40,680.71

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Solution

The fourth proportional to 145,870.55, 218,786.38 and 40,680.71 is: 61,015.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,870.55 : 218,786.38 = 40,680.71 : x
  2. Step 2: Convert to fraction form
    145,870.55/218,786.38 = 40,680.71/x
  3. Step 3: Cross multiply
    145,870.55x = 218,786.38 × 40,680.71
  4. Step 4: Simplify right side
    145,870.55x = 8,900,385,276.73
  5. Step 5: Solve for x
    x = 8,900,385,276.73/145,870.55
  6. Step 6: Final answer
    x = 61,015.64

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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.