Home / 153,103.89-211,209.76-99,405.75

Finding the Fourth Proportional to 153,103.89, 211,209.76 and 99,405.75

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Solution

The fourth proportional to 153,103.89, 211,209.76 and 99,405.75 is: 137,132.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,103.89 : 211,209.76 = 99,405.75 : x
  2. Step 2: Convert to fraction form
    153,103.89/211,209.76 = 99,405.75/x
  3. Step 3: Cross multiply
    153,103.89x = 211,209.76 × 99,405.75
  4. Step 4: Simplify right side
    153,103.89x = 20,995,464,600.12
  5. Step 5: Solve for x
    x = 20,995,464,600.12/153,103.89
  6. Step 6: Final answer
    x = 137,132.14

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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.