Home / 154,308.85-212,965.82-86,329.60

Finding the Fourth Proportional to 154,308.85, 212,965.82 and 86,329.60

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Solution

The fourth proportional to 154,308.85, 212,965.82 and 86,329.60 is: 119,145.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,308.85 : 212,965.82 = 86,329.60 : x
  2. Step 2: Convert to fraction form
    154,308.85/212,965.82 = 86,329.60/x
  3. Step 3: Cross multiply
    154,308.85x = 212,965.82 × 86,329.60
  4. Step 4: Simplify right side
    154,308.85x = 18,385,254,054.27
  5. Step 5: Solve for x
    x = 18,385,254,054.27/154,308.85
  6. Step 6: Final answer
    x = 119,145.82

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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.