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Finding the Fourth Proportional to 78,646.68, 117,692.88 and 49,078.44

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Solution

The fourth proportional to 78,646.68, 117,692.88 and 49,078.44 is: 73,444.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,646.68 : 117,692.88 = 49,078.44 : x
  2. Step 2: Convert to fraction form
    78,646.68/117,692.88 = 49,078.44/x
  3. Step 3: Cross multiply
    78,646.68x = 117,692.88 × 49,078.44
  4. Step 4: Simplify right side
    78,646.68x = 5,776,182,949.51
  5. Step 5: Solve for x
    x = 5,776,182,949.51/78,646.68
  6. Step 6: Final answer
    x = 73,444.71

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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.