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Finding the Fourth Proportional to 154,361.74, 213,030.64 and 86,385.52

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Solution

The fourth proportional to 154,361.74, 213,030.64 and 86,385.52 is: 119,218.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,361.74 : 213,030.64 = 86,385.52 : x
  2. Step 2: Convert to fraction form
    154,361.74/213,030.64 = 86,385.52/x
  3. Step 3: Cross multiply
    154,361.74x = 213,030.64 × 86,385.52
  4. Step 4: Simplify right side
    154,361.74x = 18,402,762,612.33
  5. Step 5: Solve for x
    x = 18,402,762,612.33/154,361.74
  6. Step 6: Final answer
    x = 119,218.42

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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.