Home / 129,692.16-178,988.96-76,022.28

Finding the Fourth Proportional to 129,692.16, 178,988.96 and 76,022.28

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Solution

The fourth proportional to 129,692.16, 178,988.96 and 76,022.28 is: 104,918.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,692.16 : 178,988.96 = 76,022.28 : x
  2. Step 2: Convert to fraction form
    129,692.16/178,988.96 = 76,022.28/x
  3. Step 3: Cross multiply
    129,692.16x = 178,988.96 × 76,022.28
  4. Step 4: Simplify right side
    129,692.16x = 13,607,148,834.03
  5. Step 5: Solve for x
    x = 13,607,148,834.03/129,692.16
  6. Step 6: Final answer
    x = 104,918.82

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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.