Home / 154,189.80-231,036.30-87,431.40

Finding the Fourth Proportional to 154,189.80, 231,036.30 and 87,431.40

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Solution

The fourth proportional to 154,189.80, 231,036.30 and 87,431.40 is: 131,006.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,189.80 : 231,036.30 = 87,431.40 : x
  2. Step 2: Convert to fraction form
    154,189.80/231,036.30 = 87,431.40/x
  3. Step 3: Cross multiply
    154,189.80x = 231,036.30 × 87,431.40
  4. Step 4: Simplify right side
    154,189.80x = 20,199,827,159.82
  5. Step 5: Solve for x
    x = 20,199,827,159.82/154,189.80
  6. Step 6: Final answer
    x = 131,006.25

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1.5x scale

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.