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Finding the Fourth Proportional to 78,925.44, 108,918.72 and 45,393.60

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Solution

The fourth proportional to 78,925.44, 108,918.72 and 45,393.60 is: 62,644.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,925.44 : 108,918.72 = 45,393.60 : x
  2. Step 2: Convert to fraction form
    78,925.44/108,918.72 = 45,393.60/x
  3. Step 3: Cross multiply
    78,925.44x = 108,918.72 × 45,393.60
  4. Step 4: Simplify right side
    78,925.44x = 4,944,212,808.19
  5. Step 5: Solve for x
    x = 4,944,212,808.19/78,925.44
  6. Step 6: Final answer
    x = 62,644.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.