Home / 153,698.23-212,103.14-85,715.28

Finding the Fourth Proportional to 153,698.23, 212,103.14 and 85,715.28

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Solution

The fourth proportional to 153,698.23, 212,103.14 and 85,715.28 is: 118,286.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,698.23 : 212,103.14 = 85,715.28 : x
  2. Step 2: Convert to fraction form
    153,698.23/212,103.14 = 85,715.28/x
  3. Step 3: Cross multiply
    153,698.23x = 212,103.14 × 85,715.28
  4. Step 4: Simplify right side
    153,698.23x = 18,180,480,087.55
  5. Step 5: Solve for x
    x = 18,180,480,087.55/153,698.23
  6. Step 6: Final answer
    x = 118,286.86

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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.