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Finding the Fourth Proportional to 78,814.60, 118,221.90 and 49,323.40

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Solution

The fourth proportional to 78,814.60, 118,221.90 and 49,323.40 is: 73,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,814.60 : 118,221.90 = 49,323.40 : x
  2. Step 2: Convert to fraction form
    78,814.60/118,221.90 = 49,323.40/x
  3. Step 3: Cross multiply
    78,814.60x = 118,221.90 × 49,323.40
  4. Step 4: Simplify right side
    78,814.60x = 5,831,106,062.46
  5. Step 5: Solve for x
    x = 5,831,106,062.46/78,814.60
  6. Step 6: Final answer
    x = 73,985.10

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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.