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Finding the Fourth Proportional to 78,362.40, 108,138.60 and 44,368.32

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Solution

The fourth proportional to 78,362.40, 108,138.60 and 44,368.32 is: 61,227.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,362.40 : 108,138.60 = 44,368.32 : x
  2. Step 2: Convert to fraction form
    78,362.40/108,138.60 = 44,368.32/x
  3. Step 3: Cross multiply
    78,362.40x = 108,138.60 × 44,368.32
  4. Step 4: Simplify right side
    78,362.40x = 4,797,928,009.15
  5. Step 5: Solve for x
    x = 4,797,928,009.15/78,362.40
  6. Step 6: Final answer
    x = 61,227.43

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1.5x scale

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.