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Finding the Fourth Proportional to 118,798.40, 178,072.80 and 43,870.78

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Solution

The fourth proportional to 118,798.40, 178,072.80 and 43,870.78 is: 65,760.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,798.40 : 178,072.80 = 43,870.78 : x
  2. Step 2: Convert to fraction form
    118,798.40/178,072.80 = 43,870.78/x
  3. Step 3: Cross multiply
    118,798.40x = 178,072.80 × 43,870.78
  4. Step 4: Simplify right side
    118,798.40x = 7,812,192,632.78
  5. Step 5: Solve for x
    x = 7,812,192,632.78/118,798.40
  6. Step 6: Final answer
    x = 65,760.08

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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.