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Finding the Fourth Proportional to 78,112.48, 117,168.72 and 21,950.32

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Solution

The fourth proportional to 78,112.48, 117,168.72 and 21,950.32 is: 32,925.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,112.48 : 117,168.72 = 21,950.32 : x
  2. Step 2: Convert to fraction form
    78,112.48/117,168.72 = 21,950.32/x
  3. Step 3: Cross multiply
    78,112.48x = 117,168.72 × 21,950.32
  4. Step 4: Simplify right side
    78,112.48x = 2,571,890,897.99
  5. Step 5: Solve for x
    x = 2,571,890,897.99/78,112.48
  6. Step 6: Final answer
    x = 32,925.48

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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.