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Finding the Fourth Proportional to 78,745.71, 117,987.06 and 55,330.23

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Solution

The fourth proportional to 78,745.71, 117,987.06 and 55,330.23 is: 82,902.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,745.71 : 117,987.06 = 55,330.23 : x
  2. Step 2: Convert to fraction form
    78,745.71/117,987.06 = 55,330.23/x
  3. Step 3: Cross multiply
    78,745.71x = 117,987.06 × 55,330.23
  4. Step 4: Simplify right side
    78,745.71x = 6,528,251,166.82
  5. Step 5: Solve for x
    x = 6,528,251,166.82/78,745.71
  6. Step 6: Final answer
    x = 82,902.94

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1.5x scale

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.