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Finding the Fourth Proportional to 259,987.47, 389,981.33 and 93,775.47

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Solution

The fourth proportional to 259,987.47, 389,981.33 and 93,775.47 is: 140,663.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,987.47 : 389,981.33 = 93,775.47 : x
  2. Step 2: Convert to fraction form
    259,987.47/389,981.33 = 93,775.47/x
  3. Step 3: Cross multiply
    259,987.47x = 389,981.33 × 93,775.47
  4. Step 4: Simplify right side
    259,987.47x = 36,570,682,043.10
  5. Step 5: Solve for x
    x = 36,570,682,043.10/259,987.47
  6. Step 6: Final answer
    x = 140,663.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.