Home / 85,711.40-118,157.30-60,138.04

Finding the Fourth Proportional to 85,711.40, 118,157.30 and 60,138.04

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Solution

The fourth proportional to 85,711.40, 118,157.30 and 60,138.04 is: 82,903.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,711.40 : 118,157.30 = 60,138.04 : x
  2. Step 2: Convert to fraction form
    85,711.40/118,157.30 = 60,138.04/x
  3. Step 3: Cross multiply
    85,711.40x = 118,157.30 × 60,138.04
  4. Step 4: Simplify right side
    85,711.40x = 7,105,748,433.69
  5. Step 5: Solve for x
    x = 7,105,748,433.69/85,711.40
  6. Step 6: Final answer
    x = 82,903.19

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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.