Home / 151,556.90-209,148.09-87,931.94

Finding the Fourth Proportional to 151,556.90, 209,148.09 and 87,931.94

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Solution

The fourth proportional to 151,556.90, 209,148.09 and 87,931.94 is: 121,345.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,556.90 : 209,148.09 = 87,931.94 : x
  2. Step 2: Convert to fraction form
    151,556.90/209,148.09 = 87,931.94/x
  3. Step 3: Cross multiply
    151,556.90x = 209,148.09 × 87,931.94
  4. Step 4: Simplify right side
    151,556.90x = 18,390,797,300.99
  5. Step 5: Solve for x
    x = 18,390,797,300.99/151,556.90
  6. Step 6: Final answer
    x = 121,345.83

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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.