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Finding the Fourth Proportional to 151,556.40, 209,147.40 and 87,931.44

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Solution

The fourth proportional to 151,556.40, 209,147.40 and 87,931.44 is: 121,345.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,556.40 : 209,147.40 = 87,931.44 : x
  2. Step 2: Convert to fraction form
    151,556.40/209,147.40 = 87,931.44/x
  3. Step 3: Cross multiply
    151,556.40x = 209,147.40 × 87,931.44
  4. Step 4: Simplify right side
    151,556.40x = 18,390,632,054.26
  5. Step 5: Solve for x
    x = 18,390,632,054.26/151,556.40
  6. Step 6: Final answer
    x = 121,345.14

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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.