Home / 158,415.12-218,604.51-90,429.39

Finding the Fourth Proportional to 158,415.12, 218,604.51 and 90,429.39

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Solution

The fourth proportional to 158,415.12, 218,604.51 and 90,429.39 is: 124,787.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,415.12 : 218,604.51 = 90,429.39 : x
  2. Step 2: Convert to fraction form
    158,415.12/218,604.51 = 90,429.39/x
  3. Step 3: Cross multiply
    158,415.12x = 218,604.51 × 90,429.39
  4. Step 4: Simplify right side
    158,415.12x = 19,768,272,490.55
  5. Step 5: Solve for x
    x = 19,768,272,490.55/158,415.12
  6. Step 6: Final answer
    x = 124,787.79

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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.