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Finding the Fourth Proportional to 79,692.68, 109,938.96 and 51,407.48

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Solution

The fourth proportional to 79,692.68, 109,938.96 and 51,407.48 is: 70,918.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,692.68 : 109,938.96 = 51,407.48 : x
  2. Step 2: Convert to fraction form
    79,692.68/109,938.96 = 51,407.48/x
  3. Step 3: Cross multiply
    79,692.68x = 109,938.96 × 51,407.48
  4. Step 4: Simplify right side
    79,692.68x = 5,651,684,887.42
  5. Step 5: Solve for x
    x = 5,651,684,887.42/79,692.68
  6. Step 6: Final answer
    x = 70,918.49

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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.