Home / 78,135.72-117,056.70-38,646.60

Finding the Fourth Proportional to 78,135.72, 117,056.70 and 38,646.60

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Solution

The fourth proportional to 78,135.72, 117,056.70 and 38,646.60 is: 57,897.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,135.72 : 117,056.70 = 38,646.60 : x
  2. Step 2: Convert to fraction form
    78,135.72/117,056.70 = 38,646.60/x
  3. Step 3: Cross multiply
    78,135.72x = 117,056.70 × 38,646.60
  4. Step 4: Simplify right side
    78,135.72x = 4,523,843,462.22
  5. Step 5: Solve for x
    x = 4,523,843,462.22/78,135.72
  6. Step 6: Final answer
    x = 57,897.25

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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.