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Finding the Fourth Proportional to 247,291.90, 370,851.45 and 128,923.90

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Solution

The fourth proportional to 247,291.90, 370,851.45 and 128,923.90 is: 193,340.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,291.90 : 370,851.45 = 128,923.90 : x
  2. Step 2: Convert to fraction form
    247,291.90/370,851.45 = 128,923.90/x
  3. Step 3: Cross multiply
    247,291.90x = 370,851.45 × 128,923.90
  4. Step 4: Simplify right side
    247,291.90x = 47,811,615,254.66
  5. Step 5: Solve for x
    x = 47,811,615,254.66/247,291.90
  6. Step 6: Final answer
    x = 193,340.81

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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.