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Finding the Fourth Proportional to 78,898.64, 118,349.01 and 26,308.15

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Solution

The fourth proportional to 78,898.64, 118,349.01 and 26,308.15 is: 39,462.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,898.64 : 118,349.01 = 26,308.15 : x
  2. Step 2: Convert to fraction form
    78,898.64/118,349.01 = 26,308.15/x
  3. Step 3: Cross multiply
    78,898.64x = 118,349.01 × 26,308.15
  4. Step 4: Simplify right side
    78,898.64x = 3,113,543,507.43
  5. Step 5: Solve for x
    x = 3,113,543,507.43/78,898.64
  6. Step 6: Final answer
    x = 39,462.58

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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.