Home / 135,142.90-186,495.92-74,715.04

Finding the Fourth Proportional to 135,142.90, 186,495.92 and 74,715.04

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Solution

The fourth proportional to 135,142.90, 186,495.92 and 74,715.04 is: 103,106.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,142.90 : 186,495.92 = 74,715.04 : x
  2. Step 2: Convert to fraction form
    135,142.90/186,495.92 = 74,715.04/x
  3. Step 3: Cross multiply
    135,142.90x = 186,495.92 × 74,715.04
  4. Step 4: Simplify right side
    135,142.90x = 13,934,050,122.64
  5. Step 5: Solve for x
    x = 13,934,050,122.64/135,142.90
  6. Step 6: Final answer
    x = 103,106.05

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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.