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Finding the Fourth Proportional to 78,899.40, 118,349.10 and 49,374.90

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Solution

The fourth proportional to 78,899.40, 118,349.10 and 49,374.90 is: 74,062.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,899.40 : 118,349.10 = 49,374.90 : x
  2. Step 2: Convert to fraction form
    78,899.40/118,349.10 = 49,374.90/x
  3. Step 3: Cross multiply
    78,899.40x = 118,349.10 × 49,374.90
  4. Step 4: Simplify right side
    78,899.40x = 5,843,474,977.59
  5. Step 5: Solve for x
    x = 5,843,474,977.59/78,899.40
  6. Step 6: Final answer
    x = 74,062.35

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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.