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Finding the Fourth Proportional to 154,637.03, 213,395.48 and 90,978.92

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Solution

The fourth proportional to 154,637.03, 213,395.48 and 90,978.92 is: 125,548.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,637.03 : 213,395.48 = 90,978.92 : x
  2. Step 2: Convert to fraction form
    154,637.03/213,395.48 = 90,978.92/x
  3. Step 3: Cross multiply
    154,637.03x = 213,395.48 × 90,978.92
  4. Step 4: Simplify right side
    154,637.03x = 19,414,490,303.28
  5. Step 5: Solve for x
    x = 19,414,490,303.28/154,637.03
  6. Step 6: Final answer
    x = 125,548.78

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1.5x scale

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.